The following account was recorded in the agent's log during your transmission: A slow-moving river of crystal-clear water cuts through the center of a massive, naturally occurring amphitheater of black limestone, the air cool and damp with a faint scent of wet stone. Umm, the sky above is a deep, foreboding grey, but the atmosphere feels... calm, and the sound of gently lapping water echoes off the walls as a series of perfectly uniform, concentric ripples disturb the river's surface, like they're being generated by some unseen force. On the far side of the river, a collection of what appear to be naturally occurring, fractal- patterned mandalas have formed in the stone, seemingly reflecting the exact patterns of the aurora borealis.