Human: Please generate a brief description of a spooky cave in the wilderness with quartz crystals and phosphorescent fungi. Assistant: 
Set on the brink of a deep pit, this ledge is slightly unstable at best. Tied securely to a couple of rocks is a rope ladder leading only a fraction of the way down into the pit and partially rotted through from extended periods exposed to the elements. Though badly frayed, the ladder appears to have enough strength to allow more climbers to pass along its length to yet another ledge below.