A tourist rests while sitting on terraces at the Inca citadel of Machu Picchu in Cusco, Peru, in this August 12, 2015 file photo. REUTERS/Pilar Olivares/Files

A general view of the Inca citadel of Machu Picchu is seen in Cusco, Peru, in this December 2, 2014 file photo. REUTERS/Enrique Castro-Mendivil/Files

A llama is seen near the Inca citadel of Machu Picchu in Cusco, Peru, in this December 2, 2014 file photo. REUTERS/Enrique Castro-Mendivil/Files

Daniel Filip, Tech Lead Manager for Google Maps, shows parts of the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

Tech Lead Manager for Google Maps, Daniel Filip (R) waits while carrying the Trekker, a 15-camera device, as a worker cuts tree branches to clear the road to map the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, poses with tourists, as he carries the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

An operator walks carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

An operator walks carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11. REUTERS/Pilar Olivares

An operator walks carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, walks carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

An operator walks carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

The Trekker, a 15-camera device, from Google Maps is seen while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, rests as he carries the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

An operator walks among llamas, carrying the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

A trekker Operator takes a rest carryingthe Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, carries the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11, 2015. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, operates the Trekker, a 15-camera device, with his phone while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 12, 2015. Picture taken August 12, 2015. REUTERS/Pilar Olivares

Daniel Filip, Tech Lead Manager for Google Maps, carries the Trekker, a 15-camera device, while mapping the Inca citadel of Machu Picchu for Google Street View in Cuzco, Peru, August 11, 2015. Picture taken August 11. REUTERS/Pilar Olivares TPX IMAGES OF THE DAY

Inmates sit next to a banner showing the Inca ruins of Machu Picchu, during a folk dance event at Sarita Colonia prison in Callao, Peru August 21, 2015. Local and foreign inmates participated in a folk dance festival to celebrate World Day of Folklore, which is marked on August 22. The prison houses a population of about 3,500 inmates, of whom 500 are foreigners, according to the press release for the event. REUTERS/Mariana Bazo

Visitors walk at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A tourist rests while sitting on terraces at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A tourist poses for a photo at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A tourist rests in front of a wall at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A couple takes a selfie at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A tourist poses for a photo at the Inca citadel of Machu Picchu in Cusco, Peru, August 12, 2015. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. The Machu Picchu and Huayna Picchu mountains will be undergoing maintenance works, therefore suspending visitors from the areas, in the month of April 2016, according to Archaeological Park director Fernando Astete. REUTERS/Pilar Olivares

A general view of the Inca citadel of Machu Picchu is seen in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Llamas are seen in front of the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY)

A visitor touches the Intihuatana solar clock, believed to generate "good energy," at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Andean terraces are seen at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A visitor climbs the steps at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

An ancient wall is seen at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A visitor takes photos at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

An ancient wall is seen at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

An ancient wall is seen at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Workers take part in restoration tasks at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Visitor take photos with their mobile phones at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Terraces are seen next to the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A general view of the Inca citadel of Machu Picchu is seen in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

Northern viscachas peek out from rocks stand on a rock at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT ANIMALS)

Visitors view a rainbow at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A visitor walks at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A general view of the Inca citadel of Machu Picchu is seen in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A llama is seen near the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT ANIMALS)

A visitor walks at the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

The peak of Huayna Picchu, the mountain rising above the Inca citadel of Machu Picchu, is seen in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL ENVIRONMENT)

A drone flies over the archaeological site of Cerro Chepen as it takes pictures in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, flies a drone over the archaeological site of Cerro Chepen in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

A student carries a drone, before it flies over the archaeological site of Cerro Chepen, in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, flies a drone to take pictures of the archaeological site of San Jose de Moro in Trujillo July 18, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken July 18, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

A drone flies over the archaeological site of San Jose de Moro as it takes pictures in Trujillo, July 18, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken July 18, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY)

A drone flies over the archaeological site of Cerro Chepen as it takes pictures in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

A drone flies over the archaeological site of Cerro Chepen as it takes pictures in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, flies a drone over the archaeological site of Cerro Chepen in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, flies a drone over the archaeological site of Cerro Chepen in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, prepares a drone that will take pictures of the archaeological site of Cerro Chepen in Trujillo August 3, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken August 3, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Luis Jaime Castillo, a Peruvian archaeologist with Lima's Catholic University and an incoming deputy culture minister, flies a drone to take pictures of the archaeological site of San Jose de Moro in Trujillo July 18, 2013. In Peru, home to the spectacular Inca city of Machu Picchu and thousands of ancient ruins, archaeologists are turning to drones to speed up sluggish survey work and protect sites from squatters, builders and miners. Remote-controlled aircraft were developed for military purposes and are a controversial tool in U.S. anti-terrorism campaigns, but the technology's falling price means it is increasingly used for civilian and commercial projects around the world. To match Feature PERU-ARCHAEOLOGY/ Picture taken July 18, 2013. REUTERS/Mariana Bazo (PERU - Tags: TRANSPORT EDUCATION SOCIETY SCIENCE TECHNOLOGY POLITICS)

Peru's Trade and Tourism Minister Jose Luis Silva (C) shakes hands with Garrett Hand as Jamie Neal looks on during a news conference in Lima March 1, 2013. Neal and Hand, a couple from Oakland, California, were reported to be missing and feared kidnapped while on a cycling trip through Peru. The couple embarked on an open-ended bicycle tour of South America in late November last year. Relatives said that after hearing from the couple regularly, all communication from the pair stopped on January 25, along with activity on their bank accounts. At the time, the couple were travelling to Lima from Cusco, a mountainous region near the ancient Incan city of Machu Picchu, where U.S. tourists were recently advised of kidnapping risks linked to a turf war between government forces and Maoist Shining Path rebels. Peruvian officials launched a search for Neal and Hand shortly after they were reported missing and announced on Tuesday that the couple were found safe in Angoteros, Peru, on a boat up the Napo River headed for Ecuador. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL MEDIA POLITICS BUSINESS)

Jamie Neal and Garrett Hand (L), a Californian couple who were reported to be missing and feared kidnapped while on a cycling trip through Peru, hold a news conference in Lima March 1, 2013. The couple from Oakland, California, embarked on an open-ended bicycle tour of South America in late November last year. Relatives said that after hearing from the couple regularly, all communication from the pair stopped on January 25, along with activity on their bank accounts. At the time, the couple were travelling to Lima from Cusco, a mountainous region near the ancient Incan city of Machu Picchu, where U.S. tourists were recently advised of kidnapping risks linked to a turf war between government forces and Maoist Shining Path rebels. Peruvian officials launched a search for Neal and Hand shortly after they were reported missing and announced on Tuesday that the couple were found safe in Angoteros, Peru, on a boat up the Napo River headed for Ecuador. REUTERS/Enrique Castro-Mendivil (PERU - Tags: MEDIA SOCIETY TRAVEL)

Jamie Neal and Garrett Hand (L), a young Californian couple who were reported to be missing and feared kidnapped while on a cycling trip through Peru, laugh as they speak to the media at a conference in Lima March 1, 2013. The couple from Oakland, California, embarked on an open-ended bicycle tour of South America in late November last year. Relatives said that after hearing from the couple regularly, all communication from the pair stopped on January 25, along with activity on their bank accounts. At the time, the couple were travelling to Lima from Cusco, a mountainous region near the ancient Incan city of Machu Picchu, where U.S. tourists were recently advised of kidnapping risks linked to a turf war between government forces and Maoist Shining Path rebels. Peruvian officials launched a search for Neal and Hand shortly after they were reported missing and announced on Tuesday that the couple were found safe in Angoteros, Peru, on a boat up the Napo River headed for Ecuador. REUTERS/Enrique Castro-Mendivil (PERU - Tags: MEDIA SPORT CYCLING TRAVEL TPX IMAGES OF THE DAY)

Jamie Neal and Garrett Hand (L), a young Californian couple who were reported to be missing and feared kidnapped while on a cycling trip through Peru, kiss during a news conference in Lima March 1, 2013. The couple from Oakland, California, embarked on an open-ended bicycle tour of South America in late November last year. Relatives said that after hearing from the couple regularly, all communication from the pair stopped on January 25, along with activity on their bank accounts. At the time, the couple were travelling to Lima from Cusco, a mountainous region near the ancient Incan city of Machu Picchu, where U.S. tourists were recently advised of kidnapping risks linked to a turf war between government forces and Maoist Shining Path rebels. Peruvian officials launched a search for Neal and Hand shortly after they were reported missing and announced on Tuesday that the couple were found safe in Angoteros, Peru, on a boat up the Napo River headed for Ecuador. REUTERS/Enrique Castro-Mendivil (PERU - Tags: MEDIA SPORT CYCLING TRAVEL TPX IMAGES OF THE DAY)