A view of the archaeological site Huaca El Brujo, a grand pyramid of the ancient Moche pre-Hispanic culture, in Trujillo, Peru, November 4, 2016. REUTERS/Mariana Bazo 

A vessel is seen at the museum of the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

An artefact is seen at the museum of the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture, in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

Tourists observe a mural at the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture, in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

Tourists observe a mural at the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture, in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

Tourists observe a mural at the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture, in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

Tourists observe a mural at the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture, in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

A tourist observes a mural at the archaeological site Huaca de La Luna, a grand pyramid of the ancient Moche pre-hispanic culture in Trujillo, Peru, November 3, 2016. REUTERS/Mariana Bazo 

The Pyramid of Cestius is an ancient pyramid in Rome, Italy, March 17, 2016. REUTERS/Stefano Rellandini 

The Pyramid of Cestius is an ancient pyramid in Rome, Italy, March 17, 2016. REUTERS/Stefano Rellandini 

The Pyramid of Cestius is an ancient pyramid in Rome, Italy, March 17, 2016. REUTERS/Stefano Rellandini 

The Pyramid of Cestius is an ancient pyramid in Rome, Italy, March 17, 2016. REUTERS/Stefano Rellandini 

Ancient paintings is seen at a new tomb that Egypt unveiled for the first time to the public located near the standing step pyramid, Saqqara, south of Cairo, December 20, 2015 The tomb, belonging to "Maya" who nursed the famous Tutankhamun will is openned to the public for the first time since its discovery in 1996. Archaeologists believe it could help unveil new secrets about the boy king and aid in the current exploration work being carried out on his tomb in the Valley of the Kings. REUTERS/Mohamed Abd El Ghany 

Sherif Otaifa, advisor on mega projects to the investment minister, talks during an interview with Reuters in Cairo, Egypt, December 8, 2015. Egypt's cash-strapped government says it has taken charge of plans to build a new capital after failing to close a deal with the UAE investor meant to lead a project some have compared in its ambition to the ancient pyramids. REUTERS/Mohamed Abd El Ghany 

Sherif Otaifa, advisor on mega projects to the investment minister, talks during an interview with Reuters in Cairo, Egypt, December 8, 2015. Egypt's cash-strapped government says it has taken charge of plans to build a new capital after failing to close a deal with the UAE investor meant to lead a project some have compared in its ambition to the ancient pyramids. REUTERS/Mohamed Abd El Ghany 

Egyptian Antiquities Minister Mamdouh Eldamaty holds a lit candle with diplomats as the French and Egyptian flags and France's national colours of blue, white and red are projected onto one of the Giza pyramids, in tribute to the victims of the Paris attacks, on the outskirts of Cairo, Egypt, November 15, 2015. The words on the pyramid read: "Solidarity with France". REUTERS/Amr Abdallah Dalsh 

Egyptians light candles as Russia's national colours of white, blue, and red and Russian and Egyptian flags are projected onto one of the Giza pyramids, in tribute to victims of the Russian airliner crash in October, on the outskirts of Cairo, Egypt, November 15, 2015. REUTERS/Amr Abdallah Dalsh 

Members of the media record as the French and Egyptian flags and France's national colours of blue, white and red are projected onto one of the Giza pyramids, in tribute to the victims of the Paris attacks, on the outskirts of Cairo, Egypt, November 15, 2015. The words on the pyramid read: "Solidarity with France". REUTERS/Amr Abdallah Dalsh 

Egyptians light candles as the French and Egyptian flags and France's national colours of blue, white and red are projected onto one of the Giza pyramids, in tribute to the victims of the Paris attacks, on the outskirts of Cairo, Egypt, November 15, 2015. The words on the pyramid read: "Solidarity with France". REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY

Members of the media record as the French and Egyptian flags and France's national colours of blue, white and red are projected onto one of the Giza pyramids, in tribute to the victims of the Paris attacks, on the outskirts of Cairo, Egypt, November 15, 2015. The words on the pyramid read: "Solidarity with France". REUTERS/Amr Abdallah Dalsh 

Russia's national colours of white, blue, and red and Russian and Egypt flags are projected onto one of the Giza pyramids, in tribute to victims of the Russian airliner crash in October, on the outskirts of Cairo, Egypt, November 15, 2015. REUTERS/Amr Abdallah Dalsh 

A man looks on as the Russian, Lebanese and French flags are projected on one of the Giza pyramids, in tribute to victims from the respective countries, on the outskirts of Cairo, Egypt, November 15, 2015. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY

The French and Egyptian flags and France's national colours of blue, white and red are projected onto one of the Giza pyramids, in tribute to the victims of the Paris attacks, on the outskirts of Cairo, Egypt, November 15, 2015. The words read: "Solidarity with France". REUTERS/Amr Abdallah Dalsh 

A British tourist rides a camel in front of the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A policeman (R) stands guard as a touris takes a photo at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Horse carts are parked as they wait for tourists in front of the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A British tourist rides a camel in front of the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A policeman (R) argues with a man on a horse in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A tourist takes a picture in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A policeman stands guard in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Local and foreign tourists visit the Pyramid of Khufu, the largest of the Great Pyramids of Giza, on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites. REUTERS/Amr Abdallah Dalsh 

Souvenirs are displayed for sale to tourists at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Tourists visit the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Tourists ride horses in front of the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Souvenir vendors wait for tourists in front of the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A policeman stands guard in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Tourists smile and cheer as they take a souvenir photo in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A worker looks on with his camel as he waits for tourists at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A worker rides his camel as he waits for tourists in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY

Horses run in front of workers as they wait for tourists at the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY

Tourists take a souvenir photo in front of the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

A policman looks at his mobile as tourists are seen around the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

Workers wait for tourists among their camels and horses at the Giza pyramids on the outskirts of Cairo, Egypt, November 8, 2015. Egypt's Tourism Minister Hesham Zaazou said Cairo regretted the suspension of flights and was doing all it could to secure its airports and tourist sites, adding that he would fly to Sharm al-Sheikh to oversee measures to support tourists there. REUTERS/Amr Abdallah Dalsh 

The Great Pyramids and Sphinx reflect blue light during a celebration for the 70th anniversary of the United Nations in Giza, Egypt, October 24, 2015. REUTERS/Mohamed Abd El Ghany TPX IMAGES OF THE DAY

A policeman gestures to people as he stands guard near the Sphinx, near the pyramids plateau, Egypt, June 11, 2015. Egyptian President Abdel Fattah al-Sisi ordered to increase security forces at key sites in Egypt including ancient monuments after four Egyptians were wounded in an attack at a tourist site in Luxor. REUTERS/Asmaa Waguih 

A tourist poses in front of a policeman on a camel at the pyramids plateau, Egypt, June 11, 2015. Egyptian President Abdel Fattah al-Sisi ordered to increase security forces at key sites in Egypt including ancient monuments after four Egyptians were wounded in an attack at a tourist site in Luxor. REUTERS/Asmaa Waguih 

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

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

A Mexican dressed in prehispanic costumes runs with a torch of the Pan American Games 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

Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson (R) holds up the torch of the Pan American Games 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

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

Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson gives a speech 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 

Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson listens as he attends 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

A Mexican dressed in prehispanic costumes holds up the torch of the Pan American Games as Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson (R) looks on 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

A Mexican dressed in prehispanic costumes runs with a torch of the Pan American Games as Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson (2nd R) looks on 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

Chairman of the Toronto 2015 Pan-American Games organizing committee, David Peterson (C) delivers the torch of the Pan American Games to a Mexican dressed in prehispanic costumes 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 

A Mexican dressed in prehispanic costumes runs with a torch of the Pan American Games 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

A Mexican (L) dressed in prehispanic costumes runs with a torch of the Pan American Games 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

A pyramid house is pictured in the village of Miziara, northern Lebanon May 12, 2015. Miziara prides itself on building residential homes that resemble ancient Greek temples and Egyptian ruins, one is even built in the shape of an Airbus A380. Picture taken May 12, 2015. REUTERS/Aziz Taher 

A pyramid house is pictured in the village of Miziara, northern Lebanon May 12, 2015. Miziara prides itself on building residential homes that resemble ancient Greek temples and Egyptian ruins, one is even built in the shape of an Airbus A380. Picture taken May 12, 2015. REUTERS/Aziz Taher