Tall columns of volcanic basalt make up this improbable-seeming rock formation.

Of all the houses that grace this neighborhood, only one is a testament to surreal architecture.

When the river dries up, these stones start talking.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

An enormous and lavish Gothic church in Czechia.

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

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

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

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

Mysterious painted skulls in Moravia.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Enormous sandstone towers loom within a Czech forest.

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

Mummified monks and the accidentally interred, in a 17th-century crypt.

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

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

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

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

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

Two monstrous faces loom over a village in Czechia.

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

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

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