A1101 near 10 Mile Bank

From left to right - A1101 to Littleport, New Bedford River, Welney Wash. 
Note that the level of the A1101 drops below the level of the New Bedford River. It probably says something about the history of this landscape that Littleport is 30 miles from the nearest coast, and the town of Waterbeach to the south of Littleport is a further 15 miles from the sea.