The corporal glanced down, and saw that the strange columns making up the ground were six-sided -- mostly. As she looked over the cave once more, she realized that the terrain was so bizarre that she hadn’t even noticed the pony-made structures dotting the cave floor below. There was a little wooden bridge over the river, just downstream from the waterfall cascade. At the far end, where the water disappeared deeper into the mountain, a large metal grate served to stop anypony from falling in.