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

This artificial cave looks like something out of a fairytale.

Dedicated to the unsung history of human waste.

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

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

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

America's oldest archaeological site or a muddled case of wishful thinking.

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

Walk through Czech history in Prague's largest graveyard.

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

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

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

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

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

The oldest garden in Prague, once part of an medieval orchard.

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

A series of playful yellow penguins share a serious message about the environment.

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

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

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

An abandoned munitions storage facility with a rich architectural history.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.