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

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

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

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

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

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

Bohemian paradise covered in majestic forests.

Two monstrous faces loom over a village in Czechia.

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

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

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

Walk through Czech history in Prague's largest graveyard.

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

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

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

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

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.

Macabre astrological automaton clock dating to the late 1400s.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

Dioramas and animatronics lead you through the story of Bhagavad-gita, the Indian literary classic.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

A circus legend leaves an unexpected endowment.

This workshop and small museum is dedicated to tiny, delicate figurines that began as a subversive craft after the French Revolution.