Sunbury-on-Thames, also known as Sunbury, is a town and London suburb in the Surrey borough of Spelthorne (historically Middlesex), England. Sunbury is centred 13 miles (21 km) from Charing Cross. The town has a railway station on a branch line from London Waterloo and includes junction one of the M3 motorway. Lower Sunbury contains most of the town's parks, pubs and listed buildings and is home to Kempton Park Racecourse, served by its own railway station. Offices and hotels form part of its labour-importing economy. Retail buildings are at Sunbury Cross and in four parades. By Sunbury Park is a public walled garden which has a large millennium tapestry in its art gallery/café. Most of Sunbury's riverside is privately owned, including Wheatley's Ait and Sunbury Court Island.