In Tonga, a hotel must provide a certain amount of top-notch amenities to earn 5 stars. These can include on-site gyms, spas and saunas, gourmet restaurants, premium bedding, luxury toiletries and more. What also sets 5-star hotels apart is their exceptional service. You can expect things like in-room massages, concierge services and nightly turn-down services. Some may also offer extra touches like a welcome gift.