Drink and dine in a coral cave that's at least 120,000 years old.

This nightlife venue and cultural center keeps a unique Ethiopian musical tradition alive in the nation’s capital, but breakneck urban development threatens to shut it down.

The world's largest bioluminescent area was undiscovered by science until 2005.

The most alien-looking place on Earth.

The world's largest church atop a political fault line.

These mysterious 1,000-year-old walls have revealed little about their past.

This subterranean town of over 50 dwellings lies thirty feet beneath the Earth's surface.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

This lake in northwest Iran has started turning from green to red more frequently than scientists are comfortable with.

Colorful mineral deposits turn these mountains into an Impressionist fantasy.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Napoleon’s home in exile, decorated with poisonous wallpaper.

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

This was once the center of the Birdman cult, and is now a World Heritage Site.