Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

This impressive castle looms over small German town.

Behold, a collection dedicated to Germany's favorite vegetable.

The prototype for all Nazi concentration camps.

A stairway to heaven, or to nowhere at all.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

This airport currywurst stand is made out of retro airplane parts.

A surprisingly detailed model of one of the most powerful telescopes in the world.

A miniature model of what will be the world's largest telescope.

Four-story slides send people whizzing through the math department at this Munich university.

This unique abacus hanging in the Technical University of Munich actually tells the time.

This small town in Germany was once a center of peppermint production, and has the museum to prove it.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

A subterranean display of public art and architecture.

An Orthodox church inside a small "Garden of Eden" built by a man who had a vision.

The unusually large seat sits atop the base of a ruined temple.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The telescope that discovered Neptune.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.