A self-built castle made by a mysterious man.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

Despite a recent paint job, the factory still sits empty.

A horse-drawn 1858 steam pumper fire engine encased in glass on the front lawn of a Michigan insurance company.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

For more than 50 years, an iconic sign has greeted visiting “fudgies” to the Traverse City area.

Talula the swan has been welcoming visitors to Elk Rapids, Michigan, for more than four decades.

Part taxidermy workshop, part natural history museum this Michigan destination shows off its dead animals and helps you mount your own.

Megachurch turned Catholic church comprised of 10,000 glass panes.

A massive Montreal stadium that has seen nothing but trouble since its inception.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The Boston square dedicated to the dark poet who was born nearby.

The world's largest moose statue is located (where else?) in Canada.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

The first bridge observation tower in the U.S. offers one of the best views of Maine.

Largest man-made excavation on earth!

Behold the rickety glory of one of the oldest roller coasters still standing.