What's not to love about this white colossus overlooking the sea on New Castle Island? Built in 1874 as a summer resort popular with East Coast socialites, wealthy patrons, and former presidents, the hotel retains its grand feel. All of the rooms have ocean and harbor views—the huge sunny suites, which have gas fireplaces, occupy a new building overlooking the marina. Enjoy imaginative meals in the Salt Kitchen and Bar or in the waterfront Latitudes. Amenities include a soothing spa and an indoor heated pool. The coastline and island location are superb.