One of the American Southwest's most extensive collections of Navajo rock art.

A rare memento of a lost Indigenous group.

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

The hallowed remains of a 900-year old Ancestral Pueblo great house.

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

The largest self-built castle in the U.S., six decades in the making.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The highest bridge in America was built for an almost unnervingly small amount of money.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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

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

When ecosystems collide in the arid Southwest.

Community owned and operated, this property is home to a diverse set of nudists.

Historic, 19th-century wagon wheel ruts cut into soft volcanic ash.

Unlike most arches, this geological oddity formed in a volcanic dike.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

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

No one knows exactly how deep the world’s deepest geothermal hot spring is.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

This spectacular track has run continuously since 1882.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

The graffiti-covered ruins of an abandoned trading post in the middle of Navajo Nation.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.