The following account was recorded in the agent's log during your transmission: Massive, crystalline stalactites hang from the ceiling of a hollow, kilometers-deep geode, their tips dipping into a still lake of liquid mercury that perfectly mirrors the pale, overcast sky above... Umm, air pressure's still killing me, can barely breathe, but it's weirdly silent down here - no sound, no echoes. Shattered remains of what look like ancient, petrified fungi cover the crystalline walls, their delicate, branching hyphae still somehow pulsing with a faint, bioluminescent light. The air's thick with the scent of damp earth and decaying stone, and my chest is literally going to cave in at any second.