This striking, two-toned confluence of rivers is visible from space.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This popular pitstop lives up to its name.

See massive fossils that are over 200 million years old in northeastern Arizona.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

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

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

A lingering bit of Space Race nostalgia lies in the middle of the desert.

Millions of years of erosion created the feature for which this rock formation is aptly named.

The unusual burial monument of Arizona's first governor.

The biggest solar telescope in the world helps reveal the secrets of our sun.

This church on a Tohono O'Odham reservation has stood since 1797.

First Joe Pagac sculpture; sculpture reflects native Tucson wildlife in an urban setting.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.