The current tunnel, already fairly dimly lit by just the occasional hanging lamp, suddenly opened up into a larger chamber with a high ceiling and a bright light. Beyond that forty-square-hoof room, the line Artemis was following continued straight ahead, but it looked to be completely unlit. And, more importantly, there was a large symbol painted on the floor, there. A twenty-hoof, black-filled circle with a half-hoof-thick red outline.