Severomuysky Tunnel
The 50th longest tunnel in the world
The Severomuysky Tunnel (́ ́) is a railroad tunnel on the Baikal Amur Mainline (BAM), in northwestern Buryatia, Russia. It is named after the Northern Muya Range it cuts through. The tunnel is 15.34 kilometres (9.53 mi) long, the longest in Russia (excluding metro lines).
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).