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.

German and American troops joined forces to defend this fortress during the strangest battle of World War II.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

The medieval network of canals hidden underneath the city is opened to explorers each year.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

A fearsome dragon clings to a corner of Munich's city hall.

The patron saint of spinsters grasps a container of dried blood.

The footprint of a frustrated devil in Munich's Cathedral.

A subterranean display of public art and architecture.

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

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A former Nazi lookout tower with a magnificent view of the Rhineland.

This German bone house contains the remains of some 20,000 souls.

A Neolithic burial site erected around 3000 BC.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.