This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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

A beautiful geyser under environmental threat.

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

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

The first declared National Monument in the United States.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

One man's quest to save his town with a trail of record-breaking sculptures.

"The Most Boring Road in the State."

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Haunting and beautiful trees, doomed to die.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Everything you always wanted to know about borates is here.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This giant temperature attraction created some giant electric bills.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Oddly shaped rock formation, misassociated with a nearby utopian community.