A mesmerizing landscape of 18th-century cellars carved out of the land.

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

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

Be(w)ar(e) the moat around this historic Czech castle.

Massive installation of Europe's negative stereotypes.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

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

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

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

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

Mysterious painted skulls in Moravia.

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

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

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

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Two monstrous faces loom over a village in Czechia.

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 hidden lair of an alchemist rediscovered in a 2002 flood.

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

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

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