One of two octagonal Dutch cottages (built for Dutch workers) from the 17th century which are preserved on Canvey Island. This cottage now functions as a museum. Canvey Island is a civil parish and reclaimed island in the Thames estuary in England. It is separated from the mainland of south Essex by a network of creeks. Lying only just above sea level it is prone to flooding at exceptional tides, but has nevertheless been inhabited since the Roman invasion of Britain.