The following account was recorded in the agent's log during your transmission: Water drips from stalactites, filling a vast underground lake that mirrors the constellation patterns of some ancient celestial map... not from around here, that's for sure. Uh, it's evening judging by the pale light trickling through hidden openings, and the air's crisp with this faint tang of saltwater, like you'd find in some ocean cave system. The rock face shimmers with tiny bioluminescent organisms tracing lines of cursive script from the Picatrix, and the stars outside seem to match constellations described in ancient Mesopotamian myth - only the actual stars have long since gone dark.