An International Biosphere Reserve and a federally designated wilderness area, this park preserves the only large concentration of organ pipe cacti in the country, as well as hundreds of other native ...

And though there are older, larger cactus forests in the Southwestern U.S. — Organ Pipe Cactus National Monument and Saguaro National Park come to mind — Ironwood Forest is well worth a visit ...

While Saguaro National Park was created to preserve the eponymous saguaros, this national monument is dedicated to the preservation of another incredible cactus, the organ pipe. This many-limbed ...