Haile Sand Fort

The two forts were planned in 1914, at the start of the First World War, to protect the sea entrance to the Humber Estuary. They stand 18 m above the water and have a diameter of 25 m. There was accommodation for 200 soldiers. Started in May 1915, they took more than four years to build and construction was not finished until December 1919, a year after the war ended. During the Second World War the forts were reactivated and modernised. They were regularly attacked by enemy aircraft. During this time, they installed submerged netting to prevent enemy submarines from travelling up the estuary to Hull or Grimsby. The forts were finally abandoned by the military in 1956.