Human: Write a detailed description of a depressing scene outside a wilderness ravine with lichens. Assistant: 
The canyon's slope is strewn with loose stones, making the climb extremely perilous. Very little grows in this desolate area. Only a few brown lichens cling to the underside of the rocks, perhaps nourished by dew in the few mornings when the air is slightly humid. Above the canyon ends at a thin shelf, while below it spills out into a rather woeful-looking forest. Neither direction looks particularly appealing, but either is preferable to this spot.