Hampstead Heath (locally known as "the Heath") is London's largest ancient parkland, covering 3.2 km² (320 ha; 791 acres). This grassy public space sits astride a sandy ridge, running from Hampstead to Highgate, which rests on a band of London clay. The Heath is rambling and hilly, embracing ponds, recent and ancient woodlands, a lido, playgrounds, a training track and in addition it adjoins the stately home and grounds of Kenwood House. In the south of Hampstead Heath lies Parliament Hill, the park's focal point and one of the highest points in London: the commanding view from its summit is protected by law.