The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This 13th century Gothic brick castle is the largest in the world by surface area.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

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

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

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The tallest stone dam in Poland was opened by Kaiser Wilhelm II himself.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Naturally formed rock city in Poland.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

An early 20th-century school building whose clock tower and carved symbols quietly tell the story of the trades once taught inside.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

A collection of old neon signs from all over Poland line a secluded courtyard.

A striking public sculpture representing the period of martial law in Communist Poland.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

The silly symbol for an underground protest group is now scattered around the city.

The world's longest known cave system.

This quirky local sculpture is quite literally a fish out of water.

Send your taste buds to South Asia at a sumptuous Southern dinner party.

This replica of the Greek structure is in the heart of Nashville.

These fossilized remains of an ancient saber-toothed cat inspired the mascot of Nashville's NHL team.