This precariously perched fortress was once ruled by a crow-worshipping baron.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

A giant Troll lurks under one of Seattle's oldest bridges.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A submerged archeological park still holds the wonders of a Roman Sodom.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

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

Icelandic settlement in Manitoba established in 1875.

Once known throughout Europe, this tiny and unusually progressive 18th century micro-nation within Lithuania now lies in ruins.

An unrecognized nation-state created in the 1820s to avoid taxes.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

A ruined Maya city that suffered a years-long case of mistaken identity.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This dazzlingly turquoise mountain lake was created in the wake of a natural disaster.

Buffalo's abandoned concrete grain elevators are getting a second life.

This spectacular track has run continuously since 1882.

This ancient Irish landscape boasts hundreds of legendary ruins.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

An old limestone mine transformed into a beautiful and unusual sculpture museum.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

This unique temple complex remains off the typical tourist trail.

You can row a boat through this ancient underground reservoir.