It is the double-edged sword of tourism: On the one hand it brings the awareness of beautiful places and and economic development for the local population. On the other, this exposure can lead to uncontrolled numbers of tourists, damaging the beauty they came to see.
As the authorities in Thailand close the island of Koh Tachai because of the toll of heavy tourism, we take a look at some other popular destinations that are at risk of losing their best asset.