In Pliening, a hotel must provide a specific amount of high-end conveniences to earn a 5-star rating. These can include on-site gyms, gourmet restaurants, saunas and spas, premium bedding, luxury bathroom products and more. What also sets 5-star hotels apart is their extraordinary service. You'll enjoy things like in-room massages, nightly turn-down services and concierge services. Some may even offer thoughtful touches like welcome gifts.