Human: Make a concise location description of a mystical scene inside a building with stones arranged in circles. Assistant: 
Several concentric circles of crude stones are arranged in the middle of this cavernous hall, the outer rings slightly larger than those within, giving the whole an appearance similar to a shallow amphitheater. The height of the ceiling adds to the effect, shrouding the top of the hall in utter darkness reminiscent of a vast, starless sky.