The following account was recorded in the agent's log during your transmission: A massive, crystal-encrusted cave just kinda... opens up to the sky, and like, there's a sleek, black bullet train partway through it, its wheels not quite touching the ground, despite clearly being mid-motion... Uh, sunlight's filtering through the crystal, casting this diffused, blue light everywhere, and the air's pretty crisp and mineral-rich, like after a spring rainstorm. Water's dripping off the cave's jagged edges, creating a million tiny echoes off the crystalline surfaces, but the air itself is super still, like everything's waiting for something to happen.