Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This spooky statue sits outside a famous Prague theater.