Hanging stalactites meant the cavern was at least partly natural. But the walls and floor had been smoothed. And a grid of metal poles held a maze of beams from which hung an endless sea of grated lamps. While much of the floor was smooth matte stone, shiny walkways had been buffed into the floor. The path Miller now stood on ran toward the center of the space where it split and wrapped around an octagonal control center lined with modern computers. Miller noticed that while the lights were on, there wasn’t a soul in sight. He headed for the command center. “I think we’re alone,” Miller said to the others, keeping his voice quiet. “But stay ready for anyth—” A distant high-pitched whir filled the air. It reminded Miller of the remote-controlled car he had as a kid. So he wasn’t surprised when the small, modern-looking vehicle rolled into view. To Miller it looked like a land mine on wheels, but sleek and modern. The device spun around, stopping when a small red LED light faced their direction.
