A mysterious artist-run cabinet of curiosities and library.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The curios of pharmacist and collector Henry Wellcome.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

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

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

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

The world's largest collection of garden gnomes lives among the trees and wildflowers on this woodland reserve.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Because sometimes you need to make a batch of frites even when the stores are all closed.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Underground farm located in a former bank vault deep within the bowels of Tokyo's business district.

An unexpected curiosity cabinet hidden within a department store in the Japan Post tower.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

A shrine built to combat the bad karma of a commercial venture.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

A collection of 16,000 antlers crammed beautifully into a small shed.

This rusting remnant of the local herring industry is being given a second life.