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

A surreal museum of extraordinary industrial objects.

A slice of central Asia in the middle of Berlin.

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

The largest toy museum in Poland showcases Europe's history of childhood.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

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

Art and a pun, all in one.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The final resting place for the remains of 143 Habsburg royalty.

Over 9,000 brains collected between 1945 and 1982 demonstrate the results of untreated mental illness.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Ample proof that watery ends make for well-preserved, millenia-old mummies.