Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A sixth-century Byzantine cistern hidden below a modern carpet store.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

No one is quite sure of the origins of these idyllic natural hot springs at an abandoned mountain resort.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

Flames have been burning within this mountain for more than 2,500 years.

An abandoned monastery sits on a far-off island in the Adriatic Sea.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

A marvel of Byzantine engineering under the streets of Istanbul.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

The shell of a medieval fortress offers commanding views of the area it once protected.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A crumbling World War I fort that is reached through a series of concrete tunnels.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

A collection of haunted objects and macabre oddities under one roof.