Relive a Polish uprising via an enormous, century-old cyclorama.

The silly symbol for an underground protest group is now scattered around the city.

An impressive monument to Poland's independence.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

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

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

A statue honors the children who fought Nazis in Poland.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

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 20th-century picture show in 3-D.

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

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

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

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