In Cosmos, a hotel needs to provide a certain number of high-end amenities to earn 5 stars. 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 exceptional service. You can look forward to things like concierge services, in-room massages and nightly turn-down services. Some may even offer additional touches such as welcome gifts.