In Gaua, a hotel must offer a certain level of top-notch amenities to earn 5 stars. These may include saunas and spas, on-site gyms, gourmet restaurants, premium bedding, luxury bathroom products and more. What also sets 5-star hotels apart is their guest-centric standard of service. You can expect things like nightly turn-down services, concierge services and in-room massages. Some may even offer special touches like welcome gifts.