Colossal Cave is one of the world's largest dry caves? Water no longer runs through it so the formations do not grow. This is a fabulous place to visit during Tucson's hot hot summers as the cave temperature is a constant 70 degrees! Mmmm!
Love the Southwest? Love Tucson? Every day on "Tucson Daily Photo" you'll see a new image that might be beautiful, unusual, fun, or maybe even inspirational.