No need to strap in for a "ride" on this walkable roller coaster.

The most visited, and possibly most controversial, museum in Germany.

An eerie, derelict amusement park in Berlin.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This subterranean necropolis holds three floors of antler-dug grave caves.

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

Copenhagen's celebrated theme park and gardens.