Gosport, Hampshire, England
Spitbank Fort, a 19th-century naval defense base transformed into a eight-room luxury hotel, sits on a private island in the strait of Solent, a mile off England's south coast. Each room is vast and individually designed, with gun ports that have been transformed into windows that look out onto the water, and curvy, undulating ceilings. The Bridal Suite is particularly charming, with jewel-tone bedding and a big free-standing tub in the bathroom. All rooms come with flat-screen TVs and tea- and coffee-making facilities.