Legend says train robbers stashed their gold within the depths of this unusual cave.

The first declared National Monument in the United States.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

This giant steer-skull edifice refuses to die.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

Scotland still bears an enormous scar of its Roman past.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Take a monster truck tour around an ostrich farm in the middle of the desert.

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.

The fading, forgotten remains of a once bright and booming factory.

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.