The largest underground lake in Europe.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A fortified city, home to a remaining population of five families

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

The underground hideout of a Japanese soldier for whom World War II ended in 1972.

Considered the most remote point in the entire world.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

Fire meets ice at the southernmost volcano on Earth.

Natural time capsule containing an alien ecosystem.

The best place to send your postcards home from Antarctica.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.