The prototype for all Nazi concentration camps.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

One of the most easily accessible examples of the rare 1960s UFO houses.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The footprint of a frustrated devil in Munich's Cathedral.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

The telescope that discovered Neptune.

A serious museum dedicated to two German comedians.

It houses the remains of a 17th-century version of the Titanic.

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

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

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

A surreal statue honoring Prague's favorite literary son.

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

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

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

Macabre astrological automaton clock dating to the late 1400s.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Monument to a suicide protesting the Soviet invasion.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.