More than 21,000 images fill this overlooked gem of a prehistoric site.

A house carved into a rock in the 1940s.

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

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

This rustic old building is said to be the most photographed barn in America.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

Stroll through a wonderland of stupendous moss-covered trees.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

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

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This forgotten boat elevator was an engineering marvel in its heyday.