Salang Tunnel
The 323rd longest tunnel in the world
The Salang Tunnel (Dari: Tūnel-e Sālang, Pashto: Da Sālang Tūnel) is a 2.67-kilometre-long (1.66 mi) tunnel located at the Salang Pass in northern Parwan Province of Afghanistan, about 90 km (56 mi) north of the nation's capital, Kabul. At nearly 3,400 m (11, 200 ft) above sea level, the tunnel work was originally completed by the Soviet Union in 1964. The Salang Tunnel is of strategic importance as it connects by road Central Asia with South Asia, and is the only pass going in a north–south direction to remain in use throughout the year, although it is often closed during the cold winters by heavy snowfall.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).