Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

An ancient Egyptian temple in the middle of Madrid, Spain.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Museum dedicated to awful artwork.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

This Soviet-era "closed town" was a top secret uranium producer often left off of maps.

An abandoned underground bunker not far from downtown New Orleans.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Rare mummified forest could offers a glimpse into how our environment has been changed by humans.

A long-disputed island that Denmark and Canada claim by periodically alternating flags and bottles of liquor.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

America's oldest archaeological site or a muddled case of wishful thinking.

Even Henry David Thoreau found this glacial pothole irresistible.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A Cold War atomic camp buried under the ice is now emerging because of global warming.

A Victorian marvel of engineering is now a 21st-century tourist attraction.

This small crenelated building was built by a British aristocrat who supported the American Revolution and may have named it in memory of a pivotal battle.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.