Knightsbridge is a road in the west of central London, which runs along the south side of Hyde Park. Named after a bridge which once crossed the area of water now known as the Serpentine in Hyde Park, it also gives its name to the residential area between Hyde Park and Chelsea, one of the world’s most expensive places to live. Once a known haunt for highwaymen who used to hold up coaches on their way out of London, in the nineteenth century Knightsbridge was transformed into the exclusive area it is today. A large number of upmarket shops, restaurants, bars and private banks are located here, not least the department stores Harrods and Harvey Nichols. The world’s most expensive apartment, at One Hyde Park, Knightsbridge, sold for £100 million in 2007.