Heaton Park is a public park in Manchester, England, covering an area of over 600 acres. The park includes the grounds of a Grade I listed, neoclassical 18th century country house, Heaton Hall. The hall, remodelled by James Wyatt in 1772, is now only open to the public on an occasional basis as a museum and events venue. It is the biggest pa…Heaton Park is a public park in Manchester, England, covering an area of over 600 acres. The park includes the grounds of a Grade I listed, neoclassical 18th century country house, Heaton Hall. The hall, remodelled by James Wyatt in 1772, is now only open to the public on an occasional basis as a museum and events venue. It is the biggest park in Greater Manchester, and also the largest municipal park in Europe.