This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

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

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

King Carlos IV laid the first stone during construction of this chapel.

A museum dedicated to the mysterious cryptid.

An annual festival celebrating Colorado's most famous frozen corpse.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

According to local legend, a tree grew from the stake that killed this alleged vampire. In reality, he probably died from influenza.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

The world's largest collection of witchcraft regalia.