Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

This park's art collection includes a clock made of flowers, siblings in a tree's roots, and a dove made out of weapons.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

Remnants of the United States's largest accidental oil spill still mar a California valley.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.