People escaping slavery may have hidden inside a corpse vault.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A painfully obvious spy house sits right across the street from the Russian Embassy.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This tiny home was originally a narrow alleyway.

An out-of-place slice of France, smack in the middle of Shanghai.

China's most famous acrobatics act.

This psychedelic tourist trap is a leisurely descent into madness.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A historic presidential getaway on the continental United States' southernmost island.

"We Seceded Where Others Failed."

A small poultry graveyard in the courtyard of a popular Key West watering hole.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.