The medieval "Bearded Man" relief still serves as a clever flood warning marker.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Once the home of a hermetic monk, this cave now houses a small church.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Two stunning 17th-century libraries and a cabinet of curiosities.

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

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

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

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

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

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

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

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

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.