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