The following account was recorded in the agent's log during your transmission: Massive stone pillars are supporting the ceiling of this vast, damp underground cathedral, their intricate carvings reflecting the faint, blue-green light emanating from... like, what looks to be a cluster of bioluminescent organisms suspended high above. The air's thick with the scent of damp earth and mold, and the silence is absolute, with no sound even from the dripping water forming these crystalline columns rising from the rough-hewn stone floor. Umm, a series of levitating crystals within the pillars seem to be tuning a perpetual, unheard note, somehow preventing seismic tremors in the area.