The only structure left with direct ties to the Salem witchcraft trials of 1692.

The fairy tale castle of the "fairy-tale king."

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

A museum celebrating the self-taught artist-environment builder.

A bedazzled house and crown "jewel" of outsider artist Loy Allen Bowlin.

A bypass decorated with large wooden troll carvings.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

More than 5,000 contemporary and "historic" mustards from around the world.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.