Looking at the photograph it is doubtful whether more than a tunnel, it is a cave. In fact, both responses should be correct. It’s a tunnel, but it is also a cave. Or rather, every 6 kilometers along the path of the tunnel, was built a huge cave, painted with bright colors. And this is not a bizarre artistic sense of its builders, but a precise design choice.
In fact, the greatest danger that we run along the 24.51 km of Laerdal tunnel in Norway, is not caused by traffic, almost non-existent for our standards, but to get caught up in boredom and lose the points of reference; in short, to fall into a kind of daze, very dangerous while driving. Not to mention of those who are suffering from claustrophobia.Read More »Laerdal Tunnel in Norway: Longest road tunnel in the world