In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Microscopic scenes; some call it novelty, some call it art.

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

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

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

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The first museum in the world devoted to sexual gadgetry.

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

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

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

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

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

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

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

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

One of the oldest, well-preserved water treatment facilities in all of Europe.

The rusted creatures wait to be discovered in Prague's botanical garden.