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. Because of its location, it is one of the busiest stations of the Madrid Metro.

Line 1 of the Madrid Metro is an underground metro line running from Pinar de Chamartín in the north to Valdecarros in the southeast, via Sol. Today it has 33 stations and spans 24 km (14.9 mi) from end to end.