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

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

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

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

This automated sculpture of two men peeing will spell out text messages with their micturition.

A saintly relic hidden in a Prague church basement.

This former quarry is now a picturesque gorge that hides a sunken lake.

An Orwellian sculpture with eyeball cameras watches passersby.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This doorless 20th-century elevator doesn't stop or slow down.

Bohemian paradise covered in majestic forests.

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

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

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

A mocking tribute to the past and modern leadership of Prague.

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

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

This artificial cave looks like something out of a fairytale.

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

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

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

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

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