The Long Water is the western part of the Serpentine, a 28 acre recreational lake in Hyde Park created in 1730.  It is the Serpentine Bridge, which marks the boundary between Hyde Park’s Serpentine and Kensington Gardens’s the Long Water.  Water enters through the sluice gate from the Italian Garden at the north-western end of the Long Water, where the River Westbourne feeds a set of four ornamental fountains, which in turn flow into the lake.