If you choose to spend your vacation at a 4-star hotel in Mesopotamia, you'll usually find loads of conveniences to keep you relaxed, such as a gym, pool and restaurant. You can enjoy excellent service and upscale surroundings. Go for a 5-star hotel and you'll get a few extra bells and whistles — think on-site spas, concierge assistance and nightly turndown services. You're likely to get additional amenities and first-class services at a 5-star stay, but both are terrific options for luxury travelers.