Serpukhovsko Timiryazevskaya Line

Often omitted from tunnel lists as it is in fact a metro line, the Serpukhovsko Timiryazevskaya Lines 25.5 mile length makes it the longest subway route in the world, so we feel it deserves some recognition. Originally opened in 1983, the line has been the subject of numerous expansions and lengthening until it achieved its well deserved title in 2007. It cuts the city of Moscow completely into two on a north south axis, and has a total of 25 stops along an extensive journey through the Russian capital.