Places Jessica ONeill Wants to Go

A cheeky reminder about the value of art dangles above one of Olomouc's busiest streets.

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

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

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

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

An enormous and lavish Gothic church in Czechia.

The 14th-century ruins are said to contain healing powers.

A cheeky architectural easter egg.

The mystery of the Putim Ossuary involves a tricorn hat.

Mysterious painted skulls in Moravia.

A crucified and bearded female saint.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

An existential riddle in the world's largest ancient castle.

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

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

A spiral staircase twists to the top of this unusual Czech lookout tower.

A saintly relic hidden in a Prague church basement.

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

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

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

Walk through Czech history in Prague's largest graveyard.

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

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

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