World Heritage site

  A tethered hot air balloon flies over the ancient neolithic monument of Stonehenge near Amesbury on September 7, 2016 in Wiltshire, England.  To mark the 30th anniversary of Stonehenge becoming a World Heritage Site, English Heritage has launched a competition offering members of the public the chance of a hot balloon ride which allows the chance to see a  unique view of Stonehenge within in a wider prehistoric landscape but also the see the recent changes to its setting in recent years including the removal of the A344 and the old car park.  (Photo by Matt Cardy/Getty Images)

Matt Cardy/Getty

A tethered hot air balloon flies over the ancient neolithic monument of Stonehenge near Amesbury in Wiltshire, England. To mark the 30th anniversary of Stonehenge becoming a World Heritage Site.

A Nepalese man climbs the Boudhanath stupa, a world heritage site, as he works to renovate it in Katmandu, Nepal, Thursday, Jan. 2, 2014. The Boudhanath Stupa is an important pilgrimage site for Buddhists. (AP Photo/Niranjan Shrestha)

Niranjan Shrestha/AP

A man climbs the Boudhanath Stupa, a world heritage site in Katmandu, Nepal, as he works to renovate it. The Boudhanath is an important pilgrimage site for Buddhists. 

Human skulls and bones are displayed at the Bone House (Beinhaus) in the Austrian world heritage village of Hallstatt.

Leonhard Foeger/Reuters

Human skulls and bones are displayed at the Bone House (Beinhaus) in the Austrian world heritage village of Hallstatt

Climbers walk down Mount Fuji in Fujiyoshida city, Yamanashi prefecture, Japan, Thursday, July 4, 2013. Japan's most iconic landmark, the 3,776-meter-tall Mount Fuji, was selected as a World Heritage site in June.

Shuji Kajiyama/AP

Climbers walk down Mount Fuji in Fujiyoshida city, Yamanashi prefecture, Japan on Thursday. Japan’s most iconic landmark, the 3,776m mountain was selected as a World Heritage site in June.