Methane rising to the surface of lakes
Methane bubbles trapped in ice: Here is why this phenomenon observed in the world's coldest regions is both stunning and worrisome.
The Kilauea volcano is only one of 169 active volcanoes in the USA
The extraordinary Salt Pans of Maras
General Sherman: the largest living organism in the world
The Horsetail fall attracts thousands of visitors each year
3 amazing landscapes in the western United States
Rainbow-colored mountains in China, a unique geological phenomena