Even Henry David Thoreau found this glacial pothole irresistible.

This 19th-century performer's gravestone identifies her as "the smallest woman ever in this Kingdom."

A lasting remnant of The Blitz.

An Austrian house of bones filled with hundreds of intricately painted skulls.

A legend says that if this elaborately decorated glass breaks, the good fortune of its owner's household will also disappear.

This pub boasts a curious history and may have inspired a Dickens character.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

One man's attempt to stay one step ahead of the church.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

Designed as a place for patients to take in the scenery, this tower has a dark history.

Model Trains and Much More in Hamburg.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

A monument dedicated to the unrecognized Black "mother" of modern medicine.

This forgotten chalk mine was reopened thanks to a massive effort from the local community.

Overlooking the seaside town of Margate stands a tribute to an artist's lover.

Europe's "only museum dedicated to the decapod" is full of quirky and absurdist displays, including one featuring the "famous" Giant Crab of Margate.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

A domino effect created with Britain’s iconic telephone boxes.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."