These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

A concrete arrow from a 1920s network of airmail beacons is still preserved at the western edge of suburban Reno.

This mother-daughter run curiosities shop is a beautifully odd mix of taxidermy and exotic plants.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

An environmental art installation inspired by farmhouses and crop circles.

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

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

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

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

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

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

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

All that remains of this once-booming mining town are the ruins of a saloon.

This nearly abandoned town was once a thriving mining community until a series of fires.

Abandoned silver mine strewn with wrecked and twisted structures.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

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

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

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.