The lower portal in the north on the road to Mutten. The tunnel has a slope of 3-4%. After 60 m, a slight curve begins to the right. Switzerland, Okt 10, 2018. (2/26)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/70981241@N00">Kecko</a> from Rural area of Eastern Switzerland
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/kecko/30350978187/">Mutten - Tunnel Muttnertobel</a>