A monument to the man who almost killed Hitler.

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

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A Jenga-style cylindrical tower of books that appears to go on forever.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

A roadside shrine to a late rock god only remains thanks to the unyielding efforts of his fans.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The last four extravagant street signs of London's historic banking street.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

This hidden green space is the city's second largest conservatory.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

Public access to clean drinking water was an instant hit among the masses.

A mysterious artist-run cabinet of curiosities and library.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

The oldest garden in Prague, once part of an medieval orchard.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

The collection contains over 25,000 items and details the painful dental practices of the past.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

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

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The remains of the great moral philosopher reside in a university in London.

Eclectic final resting place of the controversial explorer.

Collection dedicated to brands, packaging and advertising.