The contents of this safe survived a 37-kiloton nuclear bomb.

A picture-perfect town, perfect for blowing up.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

A series of labyrinths in the Nevada desert inspire meditation and calmness.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

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

The burial grounds of a secret society includes fences topped with fake Tesla balls.

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

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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

This spectacular track has run continuously since 1882.

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

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

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An ode to the friendship between four Pacific Rim countries.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.