Venice, one of Italy's important tourist cities, is facing the risk of submergence. The historical city is gradually sinking as it struggles with pollution caused by tourists for a long time.
UNESCO initiated efforts for the city on the cultural heritage list. They recommended the city's inclusion in the "Endangered World Heritage List."
This year, among the other places recommended for inclusion in the Endangered World Heritage List are Ukraine's cities of Kiev and Lviv.
The capital of Ukraine, Kiev.
Ukraine's Lviv city.
Ukraine's port city of Odessa, along with the archaeological sites in Yemen and Lebanon, are also among the recent additions to the Endangered World Heritage List.
Here is a photograph showing an overall view of the historical neighborhood of Sana'a, the capital of Yemen.
The Bekaa Valley in the city of Baalbek, Lebanon.
Vienna, the capital of Austria, is also under threat in its historical center.
The Tasubi Tombs in Uganda have also been added to the list after a fire incident.
The Great Barrier Reef, known as the world's largest coral reef system located in Australia, is waiting to be considered for inclusion in the endangered list. Despite warnings of its endangerment due to global warming, no decision has been announced yet.
Libya.
