Mysterious painted skulls in Moravia.

A Jenga-style cylindrical tower of books that appears to go on forever.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Two monstrous faces loom over a village in Czechia.

The hidden lair of an alchemist rediscovered in a 2002 flood.

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

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

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

This micro-nation may be some sort of prank, but its constitution sure seems official.

Sculpture garden of religious statues made it through Soviet rule.

A curious art park at the geographic center of Europe is home to 3,000 television sets and other wonders.

A memorial to the murdered Jews of Kaunas.

Ever-growing collection of devils in art.

Lithuania's outdoor sculpture trail of wooden folk art.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.