Maya Bay's ecosystem is harmed by mass tourism
Famous as the setting of "The Beach" with Leonardo DiCaprio, Maya Bay is about to close to tourists.
Somewhere in California lives the world's oldest tree
General Sherman: the largest living organism in the world
3 of the most beautiful beaches in the world
Indonesia: this is the largest highly acidic lake in the world
New Mexico's striking Carlsbad Cavern
Japan's mysterious glowing squid