Why it's incredible: The entire gas crater has been on fire for more than 50 years. The "Gates of Hell," also known as the Darvaza gas crater after a nearby village, is a methane- and fire-filled ...

Rarely does an industrial accident develop into a major tourist attraction. But when a Soviet exploratory team drilled for natural gas in Turkmenistan more than 50 years ago, they are said to have set ...

Archaeologists have uncovered hundreds of mysterious stone formations hidden in one of the most extreme environments on Earth: Harrat Khaybar, a vast lava field in northwestern Saudi Arabia. Nicknamed ...