As of 2021, the following are the top 10 UNESCO World Heritage Sites that are currently listed as “in danger” by the World Heritage Committee:
1. Everglades National Park, United States
2. Historic Center of Vienna, Austria
3. Leaning Tower of Pisa, Italy
4. Old City of Jerusalem and its Walls, Israel
5. Old Town of Hebron, Palestine
6. Liverpool – Maritime Mercantile City, United Kingdom
7. Kathmandu Valley, Nepal
8. Humberstone and Santa Laura Saltpeter Works, Chile
9. Great Barrier Reef, Australia
10. Belize Barrier Reef Reserve System, Belize
It’s important to note that the classification of “in danger” does not necessarily mean that these sites are on the brink of destruction but rather highlights various factors such as natural disasters, armed conflicts, urbanization, industrialization, or inadequate management that pose threats to their outstanding universal value.