Human: Create a detailed description of a chilling ravine in the wilderness with walls, vines, and planks. Assistant: 
Furrowing deeper into the rock, the ravine's plunging slope bends in a northeasterly angle. The sheer rock walls glisten with seeping water and the air is chilly as it slides against cold, damp stone. Vines trail down from the top of the ravine to mingle with the dark green moss and grass that have found purchase on the walls. Thick planks are staked into the ground -- not quite so uneven as a stairway, nor so smooth as a ramp.