Tunnel 33

This tunnel on the 141th km of the Circum-Baikal Railway is 302 meters long, dark and cold inside, definitely need a light source to safely walk through it.

We enjoyed the famous winter ski trail from Pereezd to Kultuk riding our fatbikes. A little muddy roads at the top and a long descent to the Baikal's surface made the day, ending with a fast ride on the marble gravel of the old railway, that's what fatbikes are made for.

Wiki: Circum-Baikal Railway