Giant topiary dog once played a role in a terrorist bomb plot.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

One of the most iconic neon ads of former East Germany.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Catacombs turned marketplace.

The highest point in Belgium is a staircase to nowhere.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

Famously misunderstood wonder of the ancient world

This small chapel is built of human bones and decorated with a golden skeleton.

Hiding the longest subterranean river known in the world.

Where once there was a train station bathroom, there is now this German burger joint.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Dead weights honor the dead of Portugal's fishing industry.

A museum dedicated to a Cold War era sausage.

This unique Renaissance castle was turned into a home for Nazi occultism.

French commune at the heart of conspiracies.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.