A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

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

The remains of a convent turned military barrack in the heart of Madrid.

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

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

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