One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

Regency-era excess on the English Coast.

Decrepit Victorian public lift is a white-knuckle ride.

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

England's most notorious suicide spot.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

Every May, townspeople welcome summer with a bizarre pagan parade led by a man wrapped in garlands.

The largest greenhouse in the world is home to over one million types of plants.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The anatomical-pathological collection of a man who changed surgery.

Pop culture has helped to keep this iconic British building from being destroyed.

An incarceration museum on the spot of possibly the oldest prison in England.

Eighty million natural history specimens call this gargantuan museum home.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.