Rumor had it that these concrete crosses scattered across the Arizona scrubland helped align spy satellites. (They didn’t.)

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

The first permanent memorial to a unique secret weapon of World War II.

The eroded core of an ancient volcano is now accessible by a short hike.

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

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

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

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