An International Biosphere Reserve and a federally designated wilderness area, this park preserves the only large concentration of organ pipe cacti in the country ... 65 billion over five years – to ...

Not only do these spiny succulents present potential harm for those hiking, camping, and exploring in Organ Pipe National Monument, but so does the desert environment in which they're growing.

If a cactus falls … It’s good to have a video camera on hand. Kevin Dahl was showing a radio reporter around Arizona’s Organ Pipe Cactus National Monument one early October day when the two stumbled ...