The street is about long and runs through the City of Westminster. It is part of the A3212, a main road in Central London that leads towards Chelsea via the Houses of Parliament and Vauxhall Bridge. It runs south from Trafalgar Square, past numerous government buildings, including the old War Office building, Horse Guards, the Ministry of Defence, the Cabinet Office and the Department of Health. It ends at the Cenotaph, the road ahead being Parliament Street. Great Scotland Yard and Horse Guards Avenue branch off to the east, while Downing Street branches off to the west at the southern section of the street.