Straight up the shaft

This is one of two gigantic shafts at either end of the Eurotunnel that houses piping for ventilation, water for firefighting, and cooling. The equipment is located at the top of the shafts, which on the France side is about 3 kilometers north of the entrance to the tunnel. The shaft is 187 feet wide, and 131 feet tall, big enough, it is said, to fit the entire Arc de Triomphe.