This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

The most alien-looking place on Earth.

An enormous concrete structure built over a nuclear crater.

Mysterious craters may have been home to an ancient cult.

An enormous, 30-story-deep hole in the middle of Guatemala City.

A picture-perfect town, perfect for blowing up.

The birthplace of both the Atomic Age and Godzilla, and the namesake of the bathing suit.

A Maori village obliterated by an 1886 volcanic eruption.

A fiery crater has been burning in the Karakum Desert since 1971.

China's beehive-shaped pyramids house the remains of a lost kingdom.

It seems that the residents of of this megalopolis suddenly vanished, but they were never actually there.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

The tiny statues form China's only known terracotta army from the Han dynasty.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This landlocked lake is the world's largest on an island.

More than 50,000 gannets claim the cliffs of Bonaventure Island.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The remains of diamond fever taken over by the desert.

Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.

Over 400,000 birds spend their summers nesting on this small Arctic island.

The end appears to be nigh for the world's fourth-longest floating bridge.

The closest thing to Mars on Earth.

Earth's greatest purely vertical drop at 4,101 feet.

"The country that ate itself."