As one of the world's largest hydroelectric dams this plant took two countries to get built.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

Does this church in Naples hold the true tomb of Vlad the Impaler, the notoriously cruel figure who inspired Bram Stoker's Dracula?

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

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

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

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

Monument to a suicide protesting the Soviet invasion.

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

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

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

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

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

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

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

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

A surreal statue honoring Prague's favorite literary son.