In Bostanci, a hotel must offer a specific number of upscale amenities to earn 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 extraordinary standard of service. You can look forward to things like nightly turn-down services, concierge services and in-room massages. Some may even offer additional touches such as a welcome gift.