A visitor looks at pieces used as offerings to the Aztec god Xochipilli, at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to the Aztec god Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art.The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

An ornamental knife, used for sacrifices, is seen at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to the Aztec god Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art. The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

Visitors look at pieces used as offerings to Aztec god Xochipilli at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art.The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

A mini instrument used as offerings to the Aztec god Xochipilli is seen at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art. The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

An image of the Aztec god Xochipilli (C), part of pieces used as offerings, is seen at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art.The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

A cameraman records pieces used as offerings to the Aztec god Xochipilli, at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to the Aztec god Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art.The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

An ornamental knife, used for sacrifices, is seen at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to the Aztec god Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art. The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

Templo Mayor museum director Patricia Ledezma (C) walks past three ornamental knives, used for sacrifices, at an exhibition titled "An Offering to Xochipilli" during a media tour at the Museum of the Templo Mayor in Mexico City August 7, 2015. Ancient offerings to the Aztec god Xochipilli which were excavated in Mexico City went on display in the Mexican capital on Friday, revealing new insights into the little-known god of art. The artefacts were discovered at the ruins of Templo Mayor, one of the largest and most important temples of the Aztec capital of Tenochtitlan, which was used for religious ceremonies and human sacrifices. REUTERS/Henry Romero 

Dancers dressed in prehispanic costumes perform during the Ceremony of the Ignition of the New Fire, at the ancient pyramids of Teotihuacan outside Mexico City May 25, 2015. The flame will be transferred to Toronto for the Pan-American games, which will be held there from July 10 to 26. REUTERS/Henry Romero

Tourists gather around Kukulcan Castle, one of the seven wonders of the modern world, at the archaeological site of Chichen Itza during the spring equinox, at the Yucatan Peninsula March 21, 2015. REUTERS/Victor Ruiz Garcia

A tourist looks at Kukulcan Castle, one of the seven wonders of the modern world, at the archaeological site of Chichen Itza during the spring equinox, at the Yucatan Peninsula March 21, 2013. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: SOCIETY TRAVEL) 

A man dressed in an Aztec costume performs a dance during a ceremony to mark the close of the 13th bak'tun outside the Pre Columbian archeological zone of Teotihuacan December 21, 2012. Thousands of mystics, hippies and tourists celebrated in the sunshine of southeastern Mexico on Friday as the Earth survived a day billed by doomsday theorists as the end of the world and a new era began for the Maya people. New Age dreamers, alternative lifestyle gurus and curious onlookers from around the world descended on the ruins of Maya cities to mark the close of the 13th bak'tun - a period of around 400 years - and many hoped it would lead to a better era for humanity. REUTERS/Henry Romero (MEXICO - Tags: SOCIETY) 

Mayte Dominuez, shaman of the town of Cuisnahuat, holds up the sacred fire during a ceremony at the Maya archeological site of Tazumal in Santa Ana, about 75 km (47 miles) away from San Salvador December 21, 2012. Mystics, hippies and tourists descended on the ruins of Maya cities to mark the close of the 13th bak'tun - a period of around 400 years - and many hoped it would lead to a better era for humanity. This week, at sunrise on Friday, December 21, an era closes in the Maya Long Count calendar, an event that has been likened by different groups to the end of days, the start of a new, more spiritual age or a good reason to hang out at old Maya temples across Mexico and Central America. REUTERS/Ulises Rodriguez (EL SALVADOR - Tags: SOCIETY) 

A woman burns incense and walks past a child during the pre-Hispanic mass of "Segunda Conexion" (Second Connection) to commemorate the 13th bak'tun, an epoch lasting roughly 400 years, outside the Chi Ixim church in Tactic, Alta Verapaz region, December 20, 2012. On December 21, an era closes in the Maya Long Count calendar, an event that has been likened by different groups to the end of days, the start of a new, more spiritual age or a good reason to hang out at old Maya temples across Mexico and Central America. The Chi Ixim church is a sacred Mayan site. REUTERS/Jorge Dan Lopez (GUATEMALA - Tags: SOCIETY ANNIVERSARY RELIGION) 

A woman offers Maya figurines for sale near the archaeological site of the Maya civilization of Copan December 18, 2012. This week, at sunrise on Friday, December 21, an era closes in the Maya Long Count calendar, an event that has been likened by different groups to the end of days, the start of a new, more spiritual age or a good reason to hang out at old Maya temples across Mexico and Central America. REUTERS/Jorge Cabrera (HONDURAS - Tags: SOCIETY ANNIVERSARY) 

Tourists climb the Maya pyramid of Nohoch Mul at the archaeological site of Coba December 15, 2012. December 21 marks the end of an age in a 5,125 year-old Maya calendar, an event that is variously interpreted as the end of days, the start of a new era or just a good excuse for a party. Thousands of New Age mystics, spiritual adventurers and canny businessmen are converging on ancient ruins in southern Mexico and Guatemala to find out what will happen. Picture taken December 15, 2012 REUTERS/Victor Gerardo Ruiz Garcia (MEXICO - Tags: TRAVEL SOCIETY RELIGION) 

The Tunupa ship is seen as Bolivian priests make offerings in Lake Titicaca, 74 km (46 miles) away from La Paz City, in La Paz December 16, 2012. Sunday marks the first of six days of celebrations to commemorate the end of the Mayan Calendar on December 21, which some believe to be the end of the world, that indigenous Bolivians regard as the change of an era. REUTERS/Gaston Brito (BOLIVIA - Tags: SOCIETY) 

A Maya woman smokes during the Oxlajuj Batz ceremony to celebrate the end of the Maya calendar in the ceremonial center of Kaminal Juyu in Guatemala City December 12, 2012. The ceremony marks the ?meditational time? before the beginning of a new calendar cycle, to be celebrated on December 21. REUTERS/William Gularte (GUATEMALA - Tags: SOCIETY) 

An actor performs a Mayan ritual as Mexican sailor Galia Moss departs on her journey through Latin America from the Xcaret ecological park in Playa del Carmen November 6, 2012. Moss will sail around Latin America alone through sponsoring countries Granada, Brazil, Uruguay, Argentina, Chile, Peru, Ecuador and the Galapagos, covering a total of 14,500 nautical miles in approximately 180 days, in support of education in Mexico. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: SOCIETY SPORT YACHTING TPX IMAGES OF THE DAY) 

Tourists take pictures of themselves in front of the Mayan temple of Kukulkan, the feathered serpent and Mayan snake deity, at the archaeological site of Chichen Itza, in the southern Mexican state of Yucatan October 29, 2012. Chichen Itza, which means "at the mouth of the well of the Itza", was a religious and commercial center during 900-1200 A.D. in the northern Mayan lowlands.The temple of Kukulkan was used for religious ceremonies and astronomical studies. Picture taken October 29, 2012. REUTERS/Claudia Daut (MEXICO - Tags: SOCIETY TRAVEL) 

An indigenous woman stands in front of a fire during a Mayan ceremony in front of a church in Chichicastenango, 140 km (87 miles) from Guatemala City, October 10, 2012. Indigenous residents of the central Guatemala Quiche region celebrate daily pre-hispanic ceremonies to ask for good health, prosperity and work in front of churches built by the Spanish conquistadors over demolished ancient Mayan temples. REUTERS/Jorge Dan Lopez (GUATEMALA - Tags: SOCIETY RELIGION) 

A man burns incense during a Mayan ceremony in front of a church in Chichicastenango, 140 km (87 miles) from Guatemala City, October 10, 2012. Indigenous residents of the central Guatemala Quiche region celebrate daily pre-hispanic ceremonies to ask for good health, prosperity and work in front of churches built by the Spanish conquistadors over demolished ancient Mayan temples. REUTERS/Jorge Dan Lopez (GUATEMALA - Tags: SOCIETY RELIGION) 

Nana Claudia, a Mayan priestess, adds candles to a "sacred" fire as part of the International day of Indigenous People celebrations in the Kaminal Juyu archaeological zone in Guatemala City August 9, 2012. REUTERS/Jorge Dan Lopez (GUATEMALA - Tags: RELIGION SOCIETY ANNIVERSARY) 

People look at the pyramid of Chichen Itza in the southern Mexican state of Yucatan March 21, 2012. Hundreds of Mexicans and tourists gathered at Chichen Itza to welcome spring at the Mayan pyramid El Castillo (The Castle), a temple to Kukulkan, the feathered serpent and Mayan snake deity. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: SOCIETY) 

Members of Guatemala's indigenous Mayan community of the Quiche region take part in a prehispanic ceremony marking the anniversary of the burning of the Spanish embassy in Guatemala City January 31, 2012. 37 people were burned to death in 1980, when government forces tried to forcefully remove a group of indigenous demonstrators that had taken the embassy in protest. REUTERS/Jorge Dan Lopez (GUATEMALA) 

A Mayan priestess performs the ritual of "Mayan Fire Ceremony" as witness two Tibetan monks during the First Tibetan Cultural Maya meeting in the Riviera Maya at Playa del Carmen September 10, 2011. The inaugural meeting aims to encourage the exchange of knowledge between these two ancient cultures and to share values related to the preservation of life and respect for nature. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: RELIGION) 

People stand around the sacred fire after burning offerings of candles, bread and honey during the "Maya Tz'ikin" or the Day of the Birds ceremony in the Kaminal Juyu archaeological zone in Guatemala City July 15, 2011. The ceremony is one of another forty leading up to the end of the current Mayan calendar cycle of 5026 years, which ends on December 21, 2012. REUTERS/Jorge Dan Lopez (GUATEMALA - Tags: RELIGION SOCIETY) 

A general view shows the exterior of the tomb of a Mayan ruler at the ruins of the Mayan city of Palenque in the hills of the southern Mexican state of Chiapas in this undated handout photo by the National Institute of Anthropology and History (INAH) released June 23, 2011. A tiny remote-controlled camera peered inside the tomb that has been sealed for 1,500 years, revealing red frescoes, pottery and pieces of a funerary shroud made of jade and mother of pearl. Archeologists had not been able to access the vault discovered in 1999 inside a pyramid among the ruins until now, the INAH said in a release on Thursday. REUTERS/INAH/Handout (MEXICO - Tags: SOCIETY TRAVEL) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS 

A man in a pre-Hispanic costume gestures during an event in honor of the Aztec water goddess Chalchiuhtlicue in Mexico City May 17, 2011. The event was held by different organizations to assert the rights of all in the city to clean water. Water shortages are common in Mexico City. REUTERS/Jorge Dan Lopez (MEXICO - Tags: SOCIETY CIVIL UNREST IMAGES OF THE DAY) 

People raise their arms towards the sun while standing in front of the Kukulcan pyramid in Chichen Itza March 20, 2011. Thousands of visitors came to welcome the spring equinox. REUTERS/Gerardo Garcia (MEXICO - Tags: SOCIETY TRAVEL) 

A hot air balloon floats past people who are watching the sunrise at the Pyramid of the Sun of Teotihuacan outside Mexico City during a festival as part of the spring equinox March 20, 2011. Hundreds of Mexicans and tourists gather at Teotihuacan every year to welcome the spring equinox. REUTERS/Henry Romero(MEXICO - Tags: SOCIETY) 

A general view of the Incan ruins of Ingapirca in southern Ecuador March 8, 2011. Originally built as an inn for Incan couriers and travelers, Ingapirca was later fortified under the control of Emperor Huayna Capac to lodge troops and following that, the emperor himself. The site is located in the southern Canar Province and stands as one of the most important Incan ruins in the country. Picture taken March 8, 2011. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY TRAVEL) 

A general view of the Incan ruins of Ingapirca in southern Ecuador March 8, 2011. Originally built as an inn for Incan couriers and travelers, Ingapirca was later fortified under the control of Emperor Huayna Capac to lodge troops and following that, the emperor himself. The site is located in the southern Canar Province and stands as one of the most important Incan ruins in the country. Picture taken March 8, 2011. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY TRAVEL) 

A view of the Sun Temple at the Incan ruins of Ingapirca in southern Ecuador March 8, 2011. Originally built as an inn for Incan couriers and travelers, Ingapirca was later fortified under the control of Emperor Huayna Capac to lodge troops and following that, the emperor himself. The site is located in the southern Canar Province and stands as one of the most important Incan ruins in the country. Picture taken March 8, 2011. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY TRAVEL) 

Members of Guatemala's indigenous Mayan community take part in a ceremony marking the anniversary of the burning of the Spanish embassy in Guatemala City January 31, 2011. 37 people were burned to death in 1980, when government forces tried to forcefully remove a group of indigenous demonstrators that had taken the embassy in protest. REUTERS/Daniel LeClair (GUATEMALA - Tags: ANNIVERSARY SOCIETY) 

A participant dressed in Aztec costume takes part in the celebration of San Judas Tadeo day next to the San Hipolito church in Mexico City October 28, 2010. San Judas Tadeo, the saint traditionally petitioned for lost causes, is one of the biggest spiritual figures among young people in Mexico City. On the 28th day of each month, his devotees undertake pilgrimages from wherever they live in the city to the shrine at the church. REUTERS/Eliana Aponte (MEXICO - Tags: POLITICS CIVIL UNREST RELIGION) 

Remains of an Aztec child, recovered during the construction of a new metro line in Mexico City, are displayed by the National Institute of Antropology and History August 17, 2010. Archeologists have uncovered more than 500-year-old remains of about 50 Aztec children, some of them stuffed into ceramic jars for burial, and the foundations of Aztec homes, hundreds of small figurines, and pots and plates dating from 1100 to 1500 AD, on the eve of the Spanish conquest, during excavations for a new subway line in Mexico City. Picture taken August 17, 2010. REUTERS/Henry Romero (MEXICO - Tags: SOCIETY) 

Remains of Aztec children, recovered during the construction of a new metro line in Mexico City, are displayed by the National Institute of Antropology and History August 17, 2010. Archeologists have uncovered more than 500-year-old remains of about 50 Aztec children, some of them stuffed into ceramic jars for burial, and the foundations of Aztec homes, hundreds of small figurines, and pots and plates dating from 1100 to 1500 AD, on the eve of the Spanish conquest, during excavations for a new subway line in Mexico City. Picture taken August 17, 2010. REUTERS/Henry Romero (MEXICO - Tags: SOCIETY) 

A Mexican dressed in Aztec costume takes part in the lighting of the flame ceremony for the Pan-American games, at the Teotihuacan archaeological site, a monument of the Aztecs, about 60 km (37 miles) north of Mexico City, June 25, 2010. The flame will be transferred to Mayaguez, Puerto Rico for the Pan-American games which will run from July 17 to August 1. REUTERS/Daniel Aguilar (MEXICO IMAGES OF THE DAY - Tags: SPORT SOCIETY) 

A group performs an Aztec dance for tourists outside the Metropolitan Cathedral in Mexico City April 8, 2010. REUTERS/Eliana Aponte (MEXICO - Tags: ENTERTAINMENT SOCIETY TRAVEL) 

A Mayan woman arrives at an event celebrating International Women's Day in Guatemala City March 8, 2010. REUTERS/Daniel LeClair (GUATEMALA - Tags: SOCIETY) 

A Mayan woman arrives at an event celebrating International Women's Day in Guatemala City March 8, 2010. REUTERS/Daniel LeClair (GUATEMALA - Tags: ENTERTAINMENT SOCIETY IMAGES OF THE DAY) 

Priests take part in ceremonies marking the Mayan new year at the ruins of Kaminal Juyu in Guatemala City February 22, 2010. REUTERS/Stringer (GUATEMALA - Tags: SOCIETY) 

A Mayan priest prepares for ceremonies marking the Mayan new year in Guatemala City late February 21, 2010. Picture taken February 21, 2010. REUTERS/Rodrigo Arias (GUATEMALA - Tags: SOCIETY) 

A view of the Inca walled complex of Sacsayhuaman in Cuzco February 17, 2010. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL) 

General view of the circular Inca terraces of Moray near the town of Maras in Cuzco February 17, 2010. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL) 

Tourists look at the Inca terraces of Moray near the town of Maras in Cuzco February 17, 2010. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL) 

Tourists take pictures in front of the Inca archeological site of Pisac in Cuzco February 16, 2010. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL) 

A tourist stands next to the Inca archaeological site of Pisac in Cuzco February 16, 2010. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY TRAVEL) 

Guatemalan Nobel Peace prize laureate Rigoberta Menchu attends an event in commemoration of the 30th anniversary of the storming and burning of the Spanish embassy in Guatemala City, January 31, 2010. A small group of native Mayans occupied the Spanish embassy on January 31, 1980 in a peaceful protest demanding rights from the government for the indigenous people. A fire broke out in the embassy when local authorities, ordered by former Guatemalan Interior Minister Donaldo Alvarez, stormed in. Thirty-seven people, including Menchu's father, died in the incident. REUTERS/Doriam Morales (GUATEMALA - Tags: ANNIVERSARY POLITICS SOCIETY) 

Mayan women Maria Ana Tay Balam (L) and Maria Magdalena Cajti, whose husbands are among the almost 250.000 people who were killed during Guatemala´s 36-year civil war, stand together after a press conference in Guatemala City September 1, 2009. Tay Balam and Cajti, along with a few others, testified against former military commissioner Felipe Cusanero, who became the first person to be convicted of the forced disappearance of people, being sentenced to 150 years in prison in a landmark case that overcame Guatemala's notorious bureaucracy and impunity. REUTERS/Doriam Morales (GUATEMALA POLITICS CRIME LAW CONFLICT) 

Workers restore artwork inside a Maya structure at the el Mirador archaeological site in the Peten jungle, Guatemala August 25, 2009. Archaeologists are using blood samples and DNA tests to prove that the final inhabitants of an ancient Maya city were finished off by their enemies in a bloody battle at the top of one of their highest pyramids. REUTERS/Daniel LeClair (GUATEMALA SCI TECH) 

A view of a Maya temple at the el Mirador archaeological site in the Peten jungle August 24, 2009. Archaeologists are using blood samples and DNA tests to prove that the final inhabitants of an ancient Maya city were finished off by their enemies in a bloody battle at the top of one of their highest pyramids. Picture taken August 24. REUTERS/Daniel LeClair (GUATEMALA SOCIETY) 

Archaeologist Richard Hanson holds an arrowhead found in the temple known as Tigre inside the el Mirador archaeological site in the Peten jungle August 25, 2009. Archaeologists are using blood samples and DNA tests to prove that the final inhabitants of an ancient Maya city were finished off by their enemies in a bloody battle at the top of one of their highest pyramids. REUTERS/Daniel LeClair (GUATEMALA SOCIETY) 

A performer takes part in an exhibition game of Maya Ball during an intercultural event in Guatemala City April 22, 2009. REUTERS/Daniel LeClair (GUATEMALA SOCIETY) 

Performers take part in an exhibition game of Maya Ball during an intercultural event in Guatemala City April 22, 2009. REUTERS/Daniel LeClair (GUATEMALA SOCIETY IMAGE OF THE DAY TOP PICTURE) 

Children play in front of the Coricancha Inca Temple in the city of Cuzco February 2, 2009. Picture taken February 2, 2009. REUTERS/Enrique Castro-Mendivil (PERU) 

Figures representing snakes are seen on a wall of the Kuelap Fortress, 3000 meters (9840 feet) above sea level, in the Andean region of Chachapollas January 30, 2009. The archaeological site of Kuelap, constructed by the Chachapollas pre-Inca culture in about 800 AD, is a massive exterior of stone walls that rise up to 19 meters (62 feet) and contains more than four hundred buildings. Picture taken January 30, 2009. REUTERS/Pilar Olivares (PERU) 

Children run outside the Kuelap Fortress, 3000 meters (9840 feet) above sea level, in the Andean region of Chachapollas January 30, 2009. The archaeological site of Kuelap, constructed by the Chachapollas pre-Inca culture in about 800 AD, is a massive exterior of stone walls that rise up to 19 meters (62 feet) and contains more than four hundred buildings. Picture taken January 30, 2009. REUTERS/Pilar Olivares (PERU)