Iron Age "bog person" preserved for over 2,300 years.

Artfully arranged bones of 5,800 Austrians.

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

Preserved "bog person" that is over 2,000 years old.

When this Iron Age bog body was discovered in 1835, it was thought that she had died recently.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Mysterious painted skulls in Moravia.

Europe's second largest ossuary wasn't discovered until 2001.

A memorial to a Swedish hockey player's "encounter" with aliens.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

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

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

An intricate and amazing house built by architect Karl Junker.

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

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Macabre astrological automaton clock dating to the late 1400s.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

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

An eerie, derelict amusement park in Berlin.

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

A church of bones, decorated with 40,000 human skeletons.