A hallway 2.50 m wide, 2.50 m high and 15 m long. The basic color of the walls is white. An LED that lights up yellow is installed at regular intervals. The appearance of the hallway is towards the underground test site. Everything is very technical but outdated technology. The tunnel may not have been used for 30 years. No more flat light at certain points and the light shines yellow. In the hallway there are explosions left and right that are throwing dirt.