The following account was recorded in the agent's log during your transmission: Towering stalactites hang from the ceiling of this vast cave, reflecting a pale blue light that filters through a massive hole in the ground above. Umm, the air's damp and still, and I can smell the sweetness of limestone... and there's a low rumbling sound that's making my chest vibrate. A perfect, upright piano's somehow embedded in the rocky wall, its surface gleaming like polished stone, and a slow, intricate melody's being played on it, with no visible keys moving. The sun's warm rays illuminate a swirling column of iridescent dust that's rising from the cave floor.