The majority of the museum's large collection is held in a storage space open to the public a few times a year.

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

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

Collection dedicated to brands, packaging and advertising.

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

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Eighty million natural history specimens call this gargantuan museum home.

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This sprawling museum holds one man's giant collection of real tanks.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

This overgrown Victorian chapel made of corrugated metal looks utterly out of place.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

The Bristol Camera Obscura housed in an ancient windmill.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

17th-century merchants in Bristol nailed their deals by placing money on these pedestals.

Banksy's image of a naked man dangling from the window of a sex health clinic.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

Stockholm's narrowest alley is barely over two feet wide.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.