Driving into a dark tunnel from the brightness of the day is amazing and exciting unless you have claustrophobia of course. Whether you find them exciting or not, tunnels are cool places until the darkness, dust, and the moisture turns them into a huge fungus breeding petri dish.
The dark hollow space needs to be cleaned of the dirt and grime. Workers can, of course, spend days at a time to scrub off the never-ending insides of these horrifying places. However, the Swiss authorities have thought of a much cooler way of doing it.
Watch this monster machine wash the tunnels in the most environment-friendly way possible.