In Oeu, a hotel must provide a certain amount of high-end amenities to earn a 5-star rating. These may include on-site gyms, gourmet restaurants, saunas and spas, luxury bathroom products, premium bedding and more. What also sets 5-star hotels apart is their guest-centric service. You'll enjoy things like concierge services, nightly turn-down services and in-room massage. Some may also offer thoughtful touches such as a welcome gift.