North Binness Island is an island in Langstone Harbour It is 900 metres (980 yd) long and up to 250 metres (270 yd) wide but only rises to 2.5 metres (8 ft) above Ordnance Datum The island was originally part of Binner's Island. The island has been uninhabited in recent times but there is evidence of historical occupation. A 100-metre (110 yd) long earthwork on the island has been suggested to date from the 18th century. There is also archaeological evidence that suggests the island was occupied during the Bronze Age and the Roman period. Finds from the Bronze Age include evidence of a salt works. The Island and has also produced finds dating back to the Mesolithic period prior to the formation of Langstone Harbour and the island.