Sofia has a small but relatively new Metro system. The first line only opened in 1998 even though plans for a Metro date back to the 1960’s. There are two lines so far with a third planned. This is the Serdica II station of the M2 line. Serdica is an interchange station for the two lines and the adjoining station for the M1 line is known simply as Serdica. The station is built beneath the ancient Thracian city of Serdica and the area around the station contains extensive excavations of the city’s remains.