Legends of treasure and spirits flow from this this fairy tale-like oasis.

A miniature train-ride through Slovenia's largest cave system.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

The ruins of this medieval castle on a foggy hill tell the story of a once-mighty empire.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

You'll find rocket launchers, not rollercoasters, at Russia's “military Disneyland.”

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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.

America's only nuclear missile silo open to the public.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

One of the few places where you can visit a cenote and Maya ruins at the same time.

This castle has links to Portugal’s founding and struggles for independence.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Enormous sandstone towers loom within a Czech forest.

An ancient Incan convent on Lake Titicaca's Island of the Moon.