While wars and revolutions have long threatened national cultural heritage sites —  most recently in Iran and Ukraine —  a new danger has emerged in the form of climate change . UNESCO World Heritage sites from the 4,000 year-old pyramid temples in Iraq to the ancient statues of Easter Island are facing extreme erosion and deterioration as temperatures rise and storms and droughts intensify. A 2025 study shows that 80% of world heritage sites are facing climate stress as materials such as wood and stone struggle to adapt to a hotter world.   Here are a few of the world's most climate-vulnerable UNESCO-listed cultural sites.…