Mysterious painted skulls in Moravia.

Enormous sandstone towers loom within a Czech forest.

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

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

Bohemian paradise covered in majestic forests.

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

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

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

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

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

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

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

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

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

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

These massive moving sand dunes have swallowed an entire village and are still on the run.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

This museum in the tower of the oldest church in Gdańsk, is home to centuries-old time-keeping devices and the world's first pulsar clock.

The site of the first battle of World War II.