One woman's Viking Castle on Lake Tahoe.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Most-visited and most-photographed slot canyon in the American Southwest.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

A Mars simulation in the southern Utah desert.

A house carved into a rock in the 1940s.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Oddly shaped rock formation, misassociated with a nearby utopian community.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

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

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

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

A spring-fed pool so deep it's used for scuba diving as well as swimming.

See the sky in a new way through this art installation.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A mysterious drive-in nestled in the forest that leaves little to the imagination.

Free public park and gardens filled with peacocks and peahens.

Continuing the tradition of the dime museum in style.