There are two bridges crossing the River Coquet. It is divided by the River Coquet. The town and its castle occupied a loop of the River Coquet. The following pillboxes have been firmly identified as part of the Coquet Stop Line. The water quality of the River Coquet system was as follows in 2016. The area provides the background to William Gibson's poem "The Sailor or the Coquet Cottage". The Holystone Burn joins the Coquet at Holystone. On 30 January Frank and Hull were on patrol near Coquet Island. The meeting was held on Coquet Island, further south off the Northumberland coast. Finally the river enters the North Sea, almost opposite Coquet Island, located out to sea.