The Geneva Suite at the Grand Hotel Kempinski in Geneva is not only the largest continuous hotel suite in Europe, it also proves there is safety in numbers. The 11,625-square-foot residence takes up the hotel’s top two floors and features bulletproof bay windows, a dedicated security room armed with closed-circuit television, and a security guard to ensure high-profile guests—such as prior hotel guests Natalie Portman, Clive Owen, and Gwyneth Paltrow—have peace of mind during their stay. The palatial playgroun…