Puerto Blanco Drive
You’ve probably seen organ pipe cactuses (Stenocereus thurberi) in the pages of this magazine, and with good reason: They’re among the Sonoran Desert’s most photogenic flora. But if you want to see them in person, you’ll have to head to Organ Pipe Cactus National Monument, along Arizona’s border with Mexico. It protects most of the species’ U.S. population, and Puerto Blanco Drive, a rugged 37-mile trek through the monument’s heart, offers plenty of organ pipes, along with a biodiverse oasis and panoramic desert views.