A Mars simulation in the southern Utah desert.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The largest island on the great salt lake is home to curious creatures and strange stories.

This ghost town was once a cult-like religious utopian settlement.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Largest collection of mounted dinosaur specimens in the world.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

A tunnel with windows, so you don't miss out on the impressive views.

Despite its name, this route in southern Utah offers a heavenly day trip.

Take a self-guided tour through one of Colorado's most elevated mining districts.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

This Colorado fire station has been in continuous operation for more than a century.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.

A Colorado store that specializes in all things spiritual, metaphysical, and witchy.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

See six states, pickled freaks, rocks, and antiques.

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

Stay in a luxury cabin or refurbished Airstream in this former mining camp-turned-retreat.

A boulder so big and tough, they had to turn it into a landmark.

This alpine statue of Jesus in Silverton is said to protect both miners and local economies.

The first mountain submarine had its initial and last voyage in 1898.