The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.

This tower was created by the area's vicar as a shelter for exhausted travelers, complete with a fireplace and breathtaking views.

Abandoned for over 20 years, this art deco seaside swimming pool is a magnificent waste.

These legendary stone steps were once used to haul coffins up the rockface.

A succinct inscription commemorates the ebb and flow of a woman's life.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

One of the few places where inexperienced snorkelers can spot a shark.

A winding, blood-red tunnel of hardened lava navigable by foot.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

2300-year-old Roman road connecting the empire.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A marvel of Byzantine engineering under the streets of Istanbul.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The celebrated eyesore created by starry-eyed sweethearts.