large group of people gathered in a quarry, seemingly for an outdoor event or gathering

large group of people gathered in a quarry, seemingly for an outdoor event or gathering. The quarry has layered, reddish-brown walls and a flat, dirt-covered floor where the people are congregated. Several cars are parked along one side, near some large rocks. Groups of people are scattered across the quarry floor; some appear to be setting up food or sitting around, while others are walking around. The sky is clear and blue. Upbeat music is playing.