UNESCO

Yemenis search for survivors under the rubble of houses in the UNESCO-listed heritage site in the old city of Yemeni capital Sanaa, on June 12, 2015 following an overnight Saudi-led air strike. Residents said the pre-dawn strike, which killed five people  was the first direct hit on old Sanaa since the launch of the bombing campaign against Huthi rebels in late March.

Mohammed Huwais/AFP

Yemenis search for survivors under the rubble of houses in the UNESCO-listed heritage site in the old city of Yemeni capital Sanaa, on Friday following an overnight Saudi-led air strike

TOPSHOTS Nepalese soldiers stand next to...TOPSHOTS Nepalese soldiers stand next to wrecked buildings at Durbar square, a UNESCO world heritage site that was badly damaged by the earthquake, in the historical centre of Kathmandu on April 29, 2015,  following a 7.8 magnitude earthquake which struck the Himalayan nation on April 25. Rescuers are facing a race against time  to find survivors of a mammoth earthquake that killed more than 5,000 people when it through Nepal five days ago and devastated large parts of one of Asia's poorest nations.    AFP PHOTO / Philippe LopezPHILIPPE LOPEZ/AFP/Getty Images

Philippe Lopez/AFP/Getty

Nepalese soldiers stand next to wrecked buildings at Durbar square, a UNESCO world heritage site that was badly damaged by the earthquake, in the historical centre of Kathmandu, Nepal 

Llamas are seen in front of the Inca citadel of Machu Picchu in Cusco. 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.

Enrique Castro-Mendivil/Reuters

Llamas are seen in front of the Inca citadel of Machu Picchu in Cusco. Machu Picchu, a UNESCO World Heritage Site, is Peru’s top tourist attraction

Tourists visit the Bell caves locate at the Beit Guvrin-Maresha National Park in central Israel, on June 24 2014. The UNESCO World Heritage Committee declared the caves of Beit Guvrin-Maresha to be a World Heritage Site. A network of some hundreds of man-made caves, excavated near  the ancient towns of Maresha and Beit-Guvrin, that bear witness to a succession of historical periods of excavation and usage stretching over 2,000 years, from the Iron Age to the Crusades, as well as a great variety of subterranean construction methods, according to the committee.

Menahem Kahana/AFP

Tourists visit the Bell caves located at the Beit Guvrin-Maresha National Park in central Israel on Tuesday. The UNESCO World Heritage Committee declared the caves of Beit Guvrin-Maresha to be a World Heritage Site

A Nepalese resident feeds pigeons in Durbar Square in Kathmandu on January 9, 2014. Home to the palaces of Malla and Shah kings who ruled over the city, Durbar Square is listed as a UNESCO world heritage site.

Prakash Mathema/AFP

A Nepalese resident feeds pigeons in Durbar Square in Kathmandu on Thursday. Home to the palaces of Malla and Shah kings who ruled over the city, Durbar Square is a Unesco world heritage site

The sun sets on the Mont Saint-Michel, a Unesco world heritage site, western France.

Damien Meyer/AFP

The sun sets over Mont Saint-Michel, a Unesco world heritage site in western France

A worker sweeps in front of Taj Mahal in Agra, India, early Monday morning, June 3, 2013. The Taj Mahal, a UNESCO Heritage site, was built in 1631 by the Mughal emperor Shah Jahan in memory of his wife Mumtaz Mahal and attracts tens of thousands of tourists every year. (AP Photo/Pawan Sharma)

Pawan Sharma/AP

A worker sweeps in front of the Taj Mahal in Agra, India