The following account was recorded in the agent's log during your transmission: A spiral staircase made of rough-hewn limestone curves upward, disappearing into a narrow opening in the sky like a tornado's funnel cloud. Water's pouring down the stairs, creating miniature waterfalls that seem to defy gravity, cascading up the sides of each step. The air's thick with the smell of damp earth, and a low hum - almost like the sound of a thousand far-off computers running Folding@home in unison - is vibrating through the ground. Umm, somehow the staircase appears to be simultaneously looping back onto itself, like an M.C. Escher print come to life.