A lush indoor jungle fills this bustling Madrid transportation hub.

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

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.

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

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

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

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

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

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

Inside houses a vast collection of military aircraft and missiles spanning the ages.

A headstone tells the sad story of a lost little boy and his pet dog.

A white oak with property rights.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

Burial site more than 300 years old.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

A wedding chapel, vintage clothing shop, and bar all under one roof.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

A water pumping station disguised as a residential home to assuage concerned neighbors now tricks most passersby.

The world's largest piece of copyrighted artwork.

The modern birthplace of Irish freedom.