Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A stealthy Apache hideaway that became the haunting site of a mass grave.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

A towering bronze statue memorializes the founding father of postwar American conservatism.

The unusual burial monument of Arizona's first governor.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

This is one really big nut.

A museum devoted entirely to the rattlesnakes and snake-related art.

When life gave this firefighter a forest fire, he made a rough-hewn sculpture park using a chainsaw.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Elevated freight railway turned wildly successful urban park.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Tucked in the back of this amazing antique store is an important piece of medical history.

A terrific purveyor of natural history objects and curios.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.