A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

"Medieval" castle built in the mid-20th century by one family.

A cableway for car transport.

Baroque celebration of the end of the Great Plague of Vienna.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Started as a kitchen garden, now the second largest botanical garden in the world.

A restaurant and observation deck built in a unique broadcasting antenna.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Art and a pun, all in one.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The oldest garden in Prague, once part of an medieval orchard.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.