Bujanov Tunnel
The 277th longest tunnel in the world
The Bujanov Tunnel (Slovak: Bujanovský tunel) is the longest double track railway tunnel in Slovakia, on the Margecany-Košice route. It is 3,411 m (11, 191 ft) long and is the second longest railway tunnel in Slovakia after the Harmanec Tunnel. It was opened in 1955.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).