The liveliest ghost town in the state.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

See massive fossils that are over 200 million years old in northeastern Arizona.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

An ADA-accessible trail and deck offering stunning views of Colorado’s Mount of the Holy Cross.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

A remote sandstone plateau named for a legendary cattle rustler.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

A coal fire has been burning underground here since 1896.

A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

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

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

This interpretive path lets you get up close and personal with dinosaur bones.

Two creeks flow out of either end of this canyon in opposite directions.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

A river runs through this remote valley in a very unexpected way.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

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

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

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

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