The Serpentine (also known as the Serpentine River) is a 28 acre (11 ha) recreational lake in Hyde Park, London, England, created in 1730. Although it is common to refer to the entire body of water as the Serpentine, strictly the name refers only to the eastern half of the lake. Serpentine Bridge, which marks the boundary between Hyde Park and Kensington Gardens, also marks the western boundary of the Serpentine; the long and narrow western half of the lake is known as the Long Water.
