human
Write a detailed description of a foreboding cave with branches, floor, water, and a nest.
assistant
The crack leading into this cave is narrow and pointed at the bottom, but it widens toward the top to allow the entrance of even the largest of beasts. A cold, black rivulet cuts a deep channel across the cave floor and tumbles out onto the trail outside. Tree branches and a collection of other odds and ends, both from nature and civilization, have been woven clumsily into a huge nest that straddles the brackish water.