An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

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

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

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

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

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

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

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

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A fifth-century temple improbably built into the side of a cliff.

A sculpture of a salmon swimming through a brick building.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

Though technically an illegal structure, this eclectic DIY apartment complex is beloved by its residents.

This sandstone mansion was the home of two of Oregon's most important pioneers.

A heavenly experience, right here on Terra Firma.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

How did a French journalist’s grave become the sexiest statue in the cemetery?

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.