The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Massive sinkholes on a mountain in one of the most remote places in Venezuela.

A historic observatory precariously perched at the "Top of Europe."

In this tiny Iranian town playing on the roof isn't just encouraged, it's the only place to go.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

An autonomous republic of Orthodox monks.

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Because sometimes you need to make a batch of frites even when the stores are all closed.

A prison tower–like edifice honoring a beloved local benefactor.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

Hindu temple of the dead home to hundreds of long-tailed macaques.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

These layered sandstone mountains in China look like they are made of pressed crayons.

One of the only places where Earth’s mantle lies above water.

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

The world's most remote permanent settlement on an active volcano.