human
Write a detailed description of a foreboding scene outside a canyon with a gate, floor, and toadstools.
assistant
A short corridor runs between a granite arch and a steel gate. Near the arch, the walls are composed of grey granite, but near the gate they suddenly give way to a black rock flecked with silvery flakes of mica. The grey granite floor is rough but level, and two toadstools in stone pots, one at either end of the corridor, provide ample light. The sound of rushing water comes from somewhere beyond the gate.