A surreal museum of extraordinary industrial objects.

A slice of central Asia in the middle of Berlin.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

An eerie, derelict amusement park in Berlin.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

The final resting place of the last "gypsy king" of Poland.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

Hundreds of notes give thanks to the patron saint of lost causes.

This bell stars in a tragic love tale and is said to make wishes come true.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

This hidden collection of everyday objects illustrates life within communist Poland.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A hidden art gallery in an abandoned Warsaw fort.