Metal sculpture folk art lining the Kansas Highway.

Once named the “world’s oldest gas station” due to its unusual construction material.

One of the first intercontinental ballistic missile sites in the United States.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

America's largest man-made forest was planted in an effort to bring back the past.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

A ghost town now swarming with dozens of prairie dogs.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

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

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

Inside this shop, visitors are treated to a unique blend of natural history and art.

A beautiful combination of living flora with preserved bones covers the shelves of this shop.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

An abandoned sawmill from more than 134 years ago stands testament to the ambition of one man.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

This sidewalk tribute honors Colorado's great culinary creation.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

It's easy to forget what century it is as you wander this rustic homestead.

This spectacular track has run continuously since 1882.