At night, the Sonoran Desert sky is so clear that stars look close enough to touch. When the moon is in view, if only a quarter phase, no other light is needed for an evening stroll. During times like these it's easy to lean back, watch the sky from horizon to horizon and contemplate our human insignificance in the vast universe.
At the Kris Eggle Visitor Center visitors admiring new museum exhibits can explore the ways of the Sonoran Desert. The free van tour of the 21-mile Ajo Mountain Loop is ranger-guided and immerses visitors in the desert landscape. Many are awed by the thousands of Organ Pipe, Saguaro, Cholla, and other cactuses that march into the distance in every direction.

The largest maternal colony of Lesser Long-Nosed Bats in North America makes its summer home in an abandoned mine on the monument. Thousands of females give birth and suckle their young through the first part of life. After the cactus flowers are gone and their fruit depleted, the colony will migrate east beyond Tucson and then south to Mexico for the winter.
Minnow-sized Sonoran Desert Pupfish swim in two small ponds next to the visitor center patio. School children from the town of Ajo, Arizona helped build these ponds as a way to preserve this endangered species, in an additional setting near their natural habitat at Quitobaquito, a historic spring and Oasis in the monument. Another endangered species, the Sonoran Pronghorn, is being reintroduced onto suitable habitat within the monument to increase the species’ chances for survival.
Organ Pipe Cactus National Monument provides opportunities for adventure and solitude within unmatched scenery. If you visit with an open heart, you may find that the Sonoran Desert inspires you to dream your own dreams and make your own memories.
source: National Park Service press release