The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

In a long-dry lake bed, these groups of massive stone pillars bear a striking resemblance to clumps of everyone's favorite fungi.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

An eerie, derelict amusement park in Berlin.

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

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Berlin's old airport.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The most visited, and possibly most controversial, museum in Germany.

A surreal museum of extraordinary industrial objects.

Boats must transform into railroad cars to navigate this Polish canal.

One of only two places in the world where two rivers cross each other without the waters mixing.

A World War II torpedo launch station abandoned off the Polish coast.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

These massive moving sand dunes have swallowed an entire village and are still on the run.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The site of the first battle of World War II.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This Communist-era residential block is one of the longest residential building in Europe.