An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

This charming candle shop has been in business since 1789.

A garden in Lisbon filled with giant porcelain creatures.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The world's oldest bookshop still in operation.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

An Orwellian sculpture with eyeball cameras watches passersby.

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

This artificial cave looks like something out of a fairytale.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

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

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

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

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

Countless grotesque faces stare out from this eerie Prague art wall.

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

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