Charles Babbage's proto-computer, painstakingly brought to life.

A clock designed to run with perfect accuracy for 10,000 years.

A historic house left in "dramatic still life."

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The remains of the great moral philosopher reside in a university in London.

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

Artfully arranged bones of 5,800 Austrians.

Yugoslavia's biggest underground airport lies in ruins.

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

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

Mysterious painted skulls in Moravia.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Macabre museum devoted to historical Viennese murders.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

A Hungarian pharmacy museum with a box full of mummy powder.

Hungarian mummies in beautiful painted coffins.

The largest catacomb system in the world.

Structure built from the skulls of vanquished foes.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

17th century palace once a meeting place for politicians.

Romania's only crater lake with water as pure as if distilled.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.