The Knepp Castle Estate is 3500 acres in total, of which the 1000 acre park is available for educational access visits. A wild herd of Exmoor ponies, fallow deer and semi de-domesticated Old English Longhorn cattle graze the park. The 19th century Nash Castle is surrounded by a 60-acre lake with a ruin of the original Castle (once owned by King John), built in the 1100s, on the far side of the lake from the modern building. With its farming operation, lakes, wilderness project, re-wilding of the river Adur project, the Knepp Estate is an ideal location to study a wide range of curriculum areas at all key stages.