Places n77u Wants to Go

The mystery of the Putim Ossuary involves a tricorn hat.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

Mysterious painted skulls in Moravia.

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

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

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

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

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

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

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

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.

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

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

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

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

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

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

This misspelled graffiti reappears every time it is removed.

This bed and breakfast is steeped in history and offers guests a unique way to experience nature—glass igloos on a frozen lake.

The last permanent exhibit dedicated to the Soviet leader.

Crawling into this primordial cave may feel disconcertingly familiar.