This ex-prison dates back to the Middle Ages.

A collection of old neon signs from all over Poland line a secluded courtyard.

The silly symbol for an underground protest group is now scattered around the city.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

This renaissance château was home to an infamous witch hunter who sent a hundred suspected witches to their deaths.

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

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

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

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

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

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

The oldest garden in Prague, once part of an medieval orchard.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A series of playful yellow penguins share a serious message about the environment.

A colossal statue of a woman hugging a modern building.

Walk through Czech history in Prague's largest graveyard.

Looming communist pillar with a Czech twist.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

A historic and beautiful Art Nouveau chamber in a historic railway station.

The largest and best-preserved rotunda in Prague.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A Baroque mansion with ties to legendary magicians and alchemists.