In Costa Viola, a hotel is required to offer a specific number of upscale conveniences to be designated 5 stars. These may include gourmet restaurants, saunas and spas, on-site gyms, complimentary luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their guest-focused service. You'll enjoy things like nightly turn-down services, concierge services and in-room massages. Some may even offer extra touches such as welcome gifts.