Ajo Window in Organ Pipe Cactus National Monument, Arizona
Photo by Jay Wilbur
NABSQNO 12S-338726-3546077. Ajo Window is a shelter natural arch eroded through volcanic tuff. It is located in Organ Pipe Cactus National Monument, in Pima County, Arizona. Ajo Window has a span of 100 feet. The smaller opening above the main opening has a span of 18 feet. Vreeland listed this arch as number 12-34 in his catalog.