Osea Island, located on the shores of the River Blackwater in Essex, offers a unique opportunity to purchase a self-contained and self-sufficient island with an established revenue stream and excellent reputation. The 380-acre island has a rich history, with evidence of Viking, Norman, and Roman eras, and has been home to various businesses and celebrities over the years. The island currently features 38 residential properties, including luxury apartments, cottages, and a grand Edwardian Manor House, as well as commercial properties and event spaces. The island also boasts a range of amenities, including a Roman Causeway, jetty, dry dock, light aircraft landing strip, and helicopter landing area. With its unique beauty, natural habitat, and excellent accessibility, Osea Island offers a wide range of potential uses, including festivals and glamping, hotel and leisure, sporting venue, retreat, and private members club.