Line ML-1 opened between Pinar de Chamartín and Las Tablas on 24 May 2007, with 5.4 kilometres (3.4 mi) and nine stations, five of which are underground. Both termini offer connections to lines of the Madrid Metro. The only above-ground stations are Antonio Saura, Álvarez de Villaamil, Palas de Rey, and Las Tablas. Line ML-1 serves the new neighbourhoods of Sanchinarro and Las Tablas, in the Fuencarral district.