Uxbridge is a large town in the West London Borough of Hillingdon. It runs parallel to the River Colne; a tributary of the River Thames, which acts as a boundary between the neighbouring county of Buckinghamshire. Much of the Uxbridge is pedestrianised and the two indoor shopping centres (Intu and The Pavillions) offer shoppers a wide array of restaurants and retail outlets. The Hillingdon Sports and Leisure Complex boasts a 50m swimming pool as well as indoor facilities for basketball, badminton and football. It also offers free parking for visitors who use the facilities, which is convenient when hiring a car in Uxbridge.