An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

This giant glowing "beanpole" adds much-needed pops of color to an otherwise drab power plant.

This viaduct serves as a reminder of World War II.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

Obscured within a ring of trees, this abandoned World War II relic hides on a German hillside.

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

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

One of the largest legal spray spots in Hamburg.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

One of the most easily accessible examples of the rare 1960s UFO houses.

An abandoned train station in Munich constructed for the 1972 Olympic games.

A staggering collection of satellite models and actual flight parts.

A subterranean display of public art and architecture.

This concrete church spent a period of its history as a World War II bunker.

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 rock resembling a turned-up boot has become the symbol of St. Ingbert.

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

What appears to be an ordinary bridge is actually a rare aqueduct.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

This museum is home to a sugar sculpture of the Berlin Airlift Memorial.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.