All aboardJust off the coast of Portsmouth lies a historic sea fortress come luxury private island. Disposed of by the Ministry of Defence in 1982, it was originally home to the hundreds of soldiers who would guard the approaches to Portsmouth. It's now been converted into a luxury venue and hotel which boasts a hot pool and sauna on the roof, and a fire pit. Eight of the former gun emplacements are now the Fort’s range of suites all of which boast stunning sea views. But be warned, it was also featured on an episode of Most Haunted.