In Luxembourg Ardennes, a hotel is required to offer a certain amount of upscale features to earn 5 stars. These may include on-site gyms, spas and saunas, gourmet restaurants, complimentary luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their guest-focused standard of 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.