Amsterdam's Red Light District leaves little to the imagination.

A public urinal so pretty, it was declared a national monument.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Barça football fans might see the insignia hidden in a church window as a divine sign.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This lucky bronze frog was gifted to Madrid by a casino.

This architectural oddity is an oasis of green on the outskirts of Valencia.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

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

Ancient snack bar of the Roman Empire re-opened.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Go inside to really appreciate this 500-year-old technological masterpiece.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.