This "floating railway" is one of the world's oldest monorail systems.

This tremendous timepiece was once the largest cuckoo clock in the world.

Legendary site where an evil bishop was devoured by rodents.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This collection of solar timekeepers includes the world's first digital sundial.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

This vast World War II defense line was the site of a fierce battle.

Abandoned since 1998, this train station has become an oasis for urban explorers.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

This small gallery nestled inside an old botanical glasshouse is a quiet place to enjoy art and nature.

Twisted buildings adorn the banks of the Rhine river.

An abandoned underground bathroom is now a space for public art.

An electrical pylon under whose legs a normal gauge train can run.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.