The red door opens into a long dark tunnel. You hear the ambient white noise of a distant wind echoing off of the cement walls. The air is cool and damp. As you move further into the tunnel your eyes adjust enough to see a golden rope leading upwards towards what seems like a natural light source. You approach the rope and realize just in time that there is a small circular hole in the ground, through which the rope hangs below. That would have been a nasty fall, you think to yourself, and peer down into the hole to detect a faint florescent yellowish-green glow – barely perceptible by contrast to the light coming from above you. You look up and see what looks like sky.