This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."

Though it's no longer a functioning train depot, this castle-like structure is an important piece of Oklahoma history.

Metal sculpture folk art lining the Kansas Highway.

This balancing rock is one of Utah's most unusual geological formations.

The taxidermied body of a bear that was a casualty of a drug trafficker’s bizarre death.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Home to Hollywood history and a very special salt crystal.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Take a stroll through this centuries-old tunnel of enormous moss-hung evergreens, nestled among the grounds of America’s first public sculpture garden.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

A local prank turned town icon.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

A 22-foot stainless steel quilting needle pays tribute to a local connection to fiber arts.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

The world's largest collection of the world's largest objects is in one small Illinois town.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

The first "Hut" was actually a small brick building.

The highest bridge in America was built for an almost unnervingly small amount of money.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.