The air cools as visitors step off the sun-baked parking lot and follow the path toward the cave mouth — a dark throat cut into the limestone shoulder of the Rincon foothills. On the Classic Cave Tour, guides lead small groups down roughly six stories (about 363 steps) into a half-mile of passages where light and time have carved stalactites, stalagmites, boxwork, helictites and flowstone into unusual shapes. The cave feels alive: drip-rates mark geological patience, and echoes carry the guides’ stories of early Native use, 19th-century miners and the train-robber folklore that surrounds this place.