Wilderness Reserve is a private estate of 8,000 acres (3,200 ha) in Suffolk's Yox Valley assembled by Jon Hunt since 1995 incorporating estates of Sibton Park, 4,500 acres (1,800 ha), Heveningham Hall, 467 acres (189 ha), Cockfield Hall, 40 acres (16 ha) and other land acquisitions within the catchments of the River Yox and Blyth Valley. The estate, which offers high-end holiday accommodation within an un-fenced landscape developed for wildlife and leisure activities includes a recently completed design for parkland and lakes by celebrated landscape architect Capability Brown (1716–1783).