Sol (Madrid Metro)

Sol is a station on Line 1, Line 2 and Line 3 of the Madrid Metro. It is located in Zone A and is the most central station on the Metro, located at the Puerta del Sol square. Thanks to its position, it is one of the busiest stations of Madrid Metro.HistoryLine 1 station became operational in 1919 with the opening of the first section of the Madrid Metro between Sol and Cuatro Caminos. The station of Line 2 was opened in 1924, it was built above the Line 1 station and perpendicular to it. The station of Line 3 was opened in 1936, located roughly at the same level as the Line 1 station and perpendicular to the Line 2. Interestingly the first sections of the first three lines opened included Sol station.In the 1960s platforms on the Line 1 were enlarged from 60 to 90 m, but bad condition of the foundations of the surface buildings prevented doing that on both platforms in parallel. So one of the platforms was expanded to the north and another one to the south, resulting in the only Madrid Metro station with non-parallel platforms.