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.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Commonly acknowledged as the only public monument to the Devil himself.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

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

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

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

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

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

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

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

A pair of gigantic baby heads greet passengers at Atocha Station.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Five candy-colored villages on the Italian Riviera.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

This Ottoman-era church is hidden amid a busy tourist area.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

Underneath one of the region's most historic roads lies the home of Plato's successor.