An artificial crater field that trained astronauts for lunar exploration.

A mysterious spirit totem at the edge of Navajo lands.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

The world's largest military aircraft cemetery.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Limestone caves with spectacular showcase chambers.

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

Ancient pueblos built into the base of a natural canyon wall.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

A spiritual vortex among the red rocks in Sedona.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

One of the largest, oldest, darkest, quietest motel rooms in the world.

The fading, forgotten remains of a once bright and booming factory.

The Magical World of George Phar Legler.

This historic national park is covered in the stunning ruins of red rock pueblos.

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

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.