A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

A taste of Middle Earth, in the middle of the Bayou City.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A statue honors the children who fought Nazis in Poland.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

Special benches that play Chopin's music are scattered throughout his native city.

One of the world's largest collections of medieval religious art.

This professional clown's home is an outsider art wonderland.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Did he come up with a theory of cosmic-ray showers while sitting in this bath?

A saintly relic hidden in a Prague church basement.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A giant interactive periodic table with real samples of the elements.

This artificial cave looks like something out of a fairytale.

A church of bones, decorated with 40,000 human skeletons.

This Polish cave has housed a dragon, a brothel, and an enduring legend.