Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This ancient market is often referred to as the oldest shopping mall in the world.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A Spanish town built into the cliffs.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

A controversial art piece that harkens back to local folklore.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An early 20th-century bullring converted into a modern shopping center.

This colorful statue welcomes visitors to a Barcelona park.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.