Human: Produce a detailed written description of a foreboding cavern setting with a wall, an archway, and several boulders. Assistant: 
The gallery ends here, at a catastrophic cave-in where a wall of giant boulders and hard-packed earth has closed off the southern vaults forever. A few humanoids dart in and out of a tiny archway to the east, but beyond that, this end of the warrens is unusually quiet.