In Sangnadae, a hotel is required to offer a specific amount of high-end conveniences to be rated 5 stars. These may include gourmet restaurants, on-site gyms, saunas and spas, premium bedding, luxury toiletries and more. What also sets 5-star hotels apart is their guest-centric standard of service. You'll enjoy things like in-room massages, concierge services and nightly turn-down services. Some may also offer special touches such as welcome gifts.