1. The Maldives

The Maldives is a tropical paradise in the Indian Ocean made up of roughly 1190 distinct islands. However, things may not stay the same for long. This island republic, which is built on a coral reef, is also the world's lowest-lying country. According to reports, the country could be fully drowned due to a variety of factors, including rising sea levels, increased ocean temperatures, and seawater acidity, which kills coral and puts the islands in grave risk.

https://www.cnbc.com/2021/05/19/maldives-calls-for-urgent-action-to-end-climate-change-sea-level-rise.html

2. The Alps 

The Alps are unquestionably one of the world's most popular ski destinations, but they may not be for much longer if climate change is not addressed. According to reports, the glaciers are rapidly disappearing. The melting of Austria's greatest glacier could be accelerated by rising temperatures. What's more terrifying is that scientists anticipate that by the end of the century, to see snow on the mountains, you'll have to ascend up to 10,000 feet.

https://wwf.panda.org/discover/knowledge_hub/where_we_work/alps/problems/climate_change/#:~:text=Global%20warming%20will%20impact%20mountain,all%20Alpine%20glaciers%20to%20recede.&text=Glacier%20recession%20has%20led%20to,0.5%20%2D%204%20m%20per%20decade

The other popular landscapes that are in danger are The great barrier reef, the dead sea and Amazon rainforest
Read about them https://www.pixstory.com/story/the-worlds-iconic-landmarks-are-at-risk-as-a-result-of-climate-change-pt-11632223285/47262
and raise awareness about other places as well.