9 miles off of the coast of north Kent out in the Thames Estuary are a cluster of seven man-made structures that emerge from the sea like tripods from War of the Worlds. Constructed in 1942 from a mix of concrete and various metals, they were designed by Guy Maunsell to form part of the UK's anti-aircraft coastal defenses during the Second World War.
They have constructed ashore and then towed out by ships to a shallower section of the seafloor (a sandbank) and then sunk into position. . boredpanda.com
2020-7-18 14:59