In far south Arizona, so far south that you could cross into Mexico if you wanted, there's an oasis in this prickly Sonoran Desert landscape that has been drawing thirsty travelers for centuries. Protected by Organ Pipe Cactus National Monument, Quitobaquito Springs has many stories to tell.

Along with the many varieties of cactus, the pond filled by streamlets running out of the hills nourishes a surprisingly lush variety of vegetation. And if you look into the feeder streams, you'll find a very rare and intriguing life form.

For additional background on this interesting area, check out the National Park Service page on it.