A devilishly named gorge that was a sign of salvation for many pioneers.

This Wyoming town is fascinated by a particular mythical creature.

Population: 1.

A popular rock that acted as a waymarker for American pioneers.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Native Americans built this circle of stones, which was used to predict astronomical events.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

A historic and oft-filmed prison stands in a Chicago suburb.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

The beloved home to all publications indie, erotic, and punky.

Cannon designed to fire an atomic warhead.

A monument celebrating the Black soldiers of the 9th and 10th Cavalry.