Fish-hook Cactus - Colorado National Monument (U.S. National Park Service)

Fish-hook Cactus Colorado national monument, Native plants, Botanical gardens

Cacti / Desert Succulents - Aztec Ruins National Monument (U.S. National Park Service)

Fish-hook Cactus Colorado national monument, Native plants, Botanical gardens

Colorado National Monument Itinerary - That Colorado Couple

Where to See Cactuses in the American Southwest, When Do They Bloom

Visitor Guide to Grand Canyon National Park

Fish hook or Barrel Cactus - Picture of Hovenweep National Monument, Cortez - Tripadvisor

Purple Fruited Prickly Pear Opuntia phaeacantha var. phaeacantha

Arizona's Sonoran Desert: Organ Pipe Cactus National Monument and Saguaro National Park - Los Angeles Times

Otto's Trail - Best Short Hike in Colorado National Monument