Inside this Krakow church, an explosion of psychedelic color.

This mushroom-shaped rock has frustrated and fascinated locals for centuries.

A perfectly preserved hill village where the buildings are painted like white lace.

The world's newest astronomical clock is also its most accurate.

Too much gossip or just missing curfew could land you in here for a couple of days.

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

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

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

This fairytale medieval church in Poland originally spent centuries in Norway.

On this Polish road, an optical illusion makes cars seem to roll uphill.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

This quaint museum tells about more than just the birth of Jesus: "betlémy" are an important piece of Czech history.

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

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

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

Steadily reminding Czechia of its past.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The first museum in the world devoted to sexual gadgetry.

Macabre astrological automaton clock dating to the late 1400s.

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

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