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.

The statue of a cursed knight is said to come to life every 100 years.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

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

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

Macabre astrological automaton clock dating to the late 1400s.

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

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

A small but charming botanical garden that contains many exotic plant species.

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Grab a slice of Catalonia’s famous flatbread in a space with ancient Roman roots.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.