A museum dedicated to a Cold War era sausage.

A unique showroom for bathroom fixtures featuring a giant toilet observation deck.

Largest illuminated advertisement sign in the world.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

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

One of the most iconic neon ads of former East Germany.

A serious museum dedicated to two German comedians.

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

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

Thousands of flowers create enchanting pink tunnels over the city streets.

This painted Lego bridge is the product of over a century of locomotive history.

An industrial relic is now one of Europe's most staggering art spaces.

Cold war icon and onetime "hole" in the iron curtain.

A German apartment building hosting as many trees as human occupants.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Ruins of a German Castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

This bike path traverses the treetops.

This bike path was sunk below water level for maximum wonder.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.