The West Anglia Main Line is one of the two main lines which run from Liverpool Street, the other being the Great Eastern Main Line. It runs generally north from London, through the towns of Cheshunt, Broxbourne, Harlow, Bishop's Stortford and Audley End (near Saffron Walden) station before reaching Cambridge, with two branches serving Hertford and Stansted Airport. The line runs along the border between Hertfordshire and Essex for much of its length.