An 18-foot-tall troll sculpture, made from recycled wood and materials found in nature.

Welcome to a starkly beautiful sanctuary where the buffalo roam.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

Crumbling hotel echoes with the sounds of the '30s.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

Spectacular 300-foot cliffs in a lush mountain canyon.

A saloon and inn that served the Wild West's most iconic figures—and is still haunted by some of them today.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

A peculiar forest that was handcrafted for government experiments.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A ghost town now swarming with dozens of prairie dogs.

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

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Every president in history is immortalized in bronze in downtown Rapid City.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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.