In Cosmos, a hotel is required to offer a specific level of top-notch amenities to be rated 5 stars. These may include on-site gyms, saunas and spas, gourmet restaurants, luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their exceptional service. You can look forward to things like concierge services, nightly turn-down services and in-room massage. Some may even offer special touches such as welcome gifts.