Cabeza Prieta National Wildlife Refuge, AZ / Cottontop cactus (Echinocactus polycephalus) with off-road vehicle tracks cutting through the desert. 32001V1
Cabeza Prieta National Wildlife Refuge, AZ. / Ocotillos, Fouquieria splendens, with green, crimson and golden coloring at dawn in Pinacate Lava flow. 112001H8
Cabeza Prieta National Wildlife Refuge, AZ. / The starry night sky, with stars rotating around the North Star, is the backdrop for a lone Saguaro cactus, Carnegiea gigantea, near Tule Well, 42002P
