Kuna Cave

Kuna Cave is a fascinating geological feature located south of Kuna, Idaho, which originated as a subterranean lava tube formed by ancient volcanic activity in the Snake River Plain. Unlike many traditional caves, this one was created when the outer crust of a flowing lava stream hardened while the molten interior drained away, leaving behind a hollow basaltic tunnel. The cave is accessible via a metal ladder (which goes straight down for approximately 50 feet) descending into a cavern that stretches approximately a quarter-mile in length, offering a cool, lightless environment that stays around 55°F year-round.