In Juan José Castelli, a hotel is required to offer a certain level of high-end amenities to earn 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 exceptional service. You can look forward to things like in-room massages, concierge services and nightly turn-down services. Some may even offer thoughtful touches such as welcome gifts.