A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

An otherworldly art experience.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Banksy gives themself artistic license with this piece of London street art.

A hands-off space for graffiti artists to hone and display their skills.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

A kaleidoscopic warehouse-maze of handmade neon signs.

A magical place that lets you play in and explore the world of Studio Ghibli.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

A modern-day Lascaux cave underneath Paris.

Notorious artist squat renovated into legal studios.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This former steel and coal plant is now a neon-lit industrial fantasia.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A little sculpture with a large wardrobe.

This modern arts center is built around a gem of late-Baroque architecture.

Theme park featuring miniature replicas of European monuments.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."