The following account was recorded in the agent's log during your transmission: A World War I-era German U-boat is somehow beached in the middle of a sprawling, crystalline cave, its hull half-buried in a sea of glittering quartz crystals. Air's really dry and cold, and the silence is almost deafening, except for this weird, low-pitched humming noise... like the crystals are vibrating or something. The U-boat's conning tower is jammed with what looks like a massive, ancient Tibetan prayer wheel, its intricate carvings spinning slowly as the cave is illuminated by a faint, blue-gray light, like it's just before dawn.