A rocky shelter in the desert hides one of the largest concentrations of cave paintings in Mexico.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

This ancient trail has claimed the lives of over 2,000 people.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

These cliff-dwellings might be Mexico's least visited archaeological site.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

Narrow slot canyons in a badland eroded into soft sedimentary rock provide an otherworldly landscape in this remote Nevada state park.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

An ill-fated attempt to grow wheat in the sagebrush steppe of northeastern Nevada.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Eulogizing an unknown man's unusual demise.

In the middle of a remote desert town is a surprisingly opulent hotel.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

A natural dome made of volcanic glass in Inyo National Forest.

Eons old volcanic activity created one of the most stunning rock formations in the United States.