Paston Great Barn is a National Nature Reserve in Norfolk, covering 0.01 km². The county has 20 National Nature Reserves; this is one. It is the smallest of them. It lies within the Norfolk Coast National Landscape.
For arrivals by rail, North Walsham Station is about 6.3 km to the south-west. Ant Broads and Marshes and Calthorpe Broad are among the National Nature Reserves within 12 km.