Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A tiny church on a man-made island in the Adriatic.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

A tribute to Ponce de Leon's supposed quest for eternal youth.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Bizarre Cavern.

A monument marks the location of the first successful steamboat demonstration.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.