Rock Formations. Seaton Sluice, Northumberland Cliffs and Sea at Seaton Sluice, Northumberland Rock formation near the old sluice gates Cliffs and Sea at Seaton Sluice, Northumberland Sweeping Northward. Northumberland Coast Rocks and Sea at Seaton Sluice, Northumberland HFF folks!!! HFF Mooring Rope 3 Side By Side Mooring Rope 2 Mooring Rope 1 Leaking Sinking Wreck and Reflections Sinking Wreck 2 Sinking Wreck At The Rainy Garden Centre 3 At The Rainy Garden Centre 2 At The Rainy Garden Centre 1 Raindrops Raindrops Raindrops Raindrops Cliffs and Sea at Seaton Sluice, Northumberland Sheer Drop Rock Formations. Seaton Sluice, Northumberland Through the sluice into the North Sea DSC 0017 DSC 0057 DSC 0040 DSC 0087 DSC 0060 DSC 0044 DSC 0035 Frozen Reflections Frozen Reflections Frozen Reflections