Something riverine

London River, aka The Thames. Concrete barges built to be part of one of the Mulberry harbours towed to France during the invasion of Normandy in 1944. Some were brought back to become part of the sea defences along the north bank of the Thames in Essex. In the background are the Towers of Mordor, or as most call it, the commercial district of Canary Wharf in Docklands.