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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

An extensive collection of ancient Egyptian artifacts and mummies.

The celebrated eyesore created by starry-eyed sweethearts.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Statue of death tucked in the University of Medicine courtyard.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A subterranean shelter remains intact under a busy Paris railway station.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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

This offbeat trailer park is home to vintage peddlers, local artists, indie makers, and more.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

The little bear in the "funny kind of hat" has made his way from London back to Peru.