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

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

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

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

This bridge over the River Cuale leads to a neighborhood that was once an escape for Hollywood's elite.

The unfinished final resting place of some of Spain's most prominent politicians.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The world's largest wooden structure.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

A 16th-century Andalusian palace.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

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

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

The narrowest house in America is seven feet of pure spite.

America's first federal monument.

An original apothecary from 1792.

Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Wayne Newton's sprawling estate is now open for visitors to catch a glimpse of his "heart and soul."

An exotic wildlife habitat right off The Strip.

A new kind of theme park for adults off the Las Vegas Strip.