135 miles S of Phoenix; 140 miles W of Tucson; 185 miles SE of Yuma
Located roughly midway between Yuma and Tucson, Organ Pipe Cactus National Monument is a preserve for the rare cactus for which the monument is named. The organ pipe cactus resembles the saguaro cactus in many ways, but instead of forming a single main trunk, organ pipes have many trunks, some 20 feet tall, that resemble -- you guessed it -- organ pipes.
This is a rugged region with few towns or services. To the west lie the inaccessible Cabeza Prieta National Wildlife Refuge and the Barry M. Goldwater Air Force Range (a bombing range), and to the east is the large Tohono O'odham Indian Reservation. The only motels in the area are in the small town of Ajo, a former company town that was built to house copper-mine workers. The downtown plaza, with its tall palm trees, covered walkways, and arches, has the look and feel of a Mexican town square. Be sure to gas up your car before leaving Ajo.