Cthulhu Cave

When I was in the Black Hills a few days ago, I paid a visit to the Jewel Caves, which is the third largest cave system in the world, with more than 177 miles of rooms, corridors, and . . . terror? While I saw only a tiny portion of the cave, what I did see was disturbing. Not only did passing through the cave entrance resemble a journey through the epiglottis of a vast, cyclopean subterranean creature, but a great number of the cave formations suggested tentacled beings, or an acrodont with...