Organ Pipe National Monument
This takes some driving—168 miles of it—but it's worth it. AZ Hwy. 86 will take you west to the tiny town of Why. Turn left on AZ Hwy. 85 to get to the monument headquarters. Along the way you'll pass by Robles Junction (also known as Three Points), Kitt Peak, and the Tohono O'odham capital, Sells. When you get to Organ Pipe, enjoy a drive or take a hike through the 517-square-mile preserve of rare cacti. Phone 520-387-6849.