A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

A little-known hot spring haven right below the highway.

16,500-acre ranch filled with American heritage, geological wonders, and a giant pile of tires is the crown jewel of an intriguing tug-of-war.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Abandoned silver mine strewn with wrecked and twisted structures.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

This 19th-century ranch is being transformed into a residential library with thousands of books about the natural world.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

A prehistoric rock shelter that's literally in someone's backyard.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.