Hyde Park, a park in London. It covers 360 acres (146 hectares) in the borough of Westminster in the central part of London and adjoins Kensington Gardens on the west. At the northeast corner is the Marble Arch, and near it Speakers' Corner, noted for “soap box” oratory. The Serpentine is a curving artificial lake that extends into Kensington Gardens. A bridle path that follows the southern border is called Rotten Row, a corruption of the old French name Route du Roi (Route of the King).