Organ Pipe Cactus National Monument is the US side of the UNESCO Biosphere Reserve that straddles the border between Arizona and Mexico. This area of the Sonoran Desert - or Green Desert - is the only place in the US where the Organ Pipe Cactus grows wild.

#nationalparks #organpipenm #desert #nps

Organ Pipe National Monument. @organpipenps I made a little run out to AZ border last year. On the cold East coast currently. These pictures warm me! #nps #nationalpark #nationalparks #arizona #organpipenm #warmth #cactus #cacti #border