Big Four Ice Caves, Washington: One of the most popular attractions in Mount Baker-Snoqualmie National Forest, and only a short drive from Seattle, these caves are formed in a perennial pile of avalanche debris on the north face of Big Four Mountain which is kept from melting by the mountain's shadow. Streams formed by the summer melt carve the caves out of the ice..
Big four Ice Caves - outside of Granite Falls, Washington. Been there, done that ... lucky to be alive. (We hiked back to the face of the mountain and within 30 seconds of our exiting the cave, its ceiling collapsed. We were young and dumb ... drove back to Granite Falls and knocked back a few, if memory serves.