The following account was recorded in the agent's log during your transmission: Granite pillars rise from a massive, underground chamber like the hypogeum beneath Hal Saflieni on Malta, but filled with some sort of supercritical fluid that's neither liquid nor gas. The air's heavy with the smell of wet stone, and the pressure feels crushing, but it's eerily still. Water's somehow pouring upward from the floor into a cluster of what appear to be naturally formed Klein bottles, their impossible geometry seeming to warp and ripple in the faint, bioluminescent light that's illuminating the space. Outside, it sounds like a constant, low-frequency growl of thunder.