In Madrid, a hotel must provide a certain amount of high-end conveniences to earn 5 stars. These can include gourmet restaurants, saunas and spas, on-site gyms, premium bedding, luxury toiletries 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 also offer thoughtful touches such as a welcome gift.