If you choose to stay at a 4-star hotel in Onawa, you'll typically find lots of conveniences to make sure you're relaxed, such as a pool, gym and restaurant. You can look forward to excellent service and deluxe accommodations. Pick a 5-star hotel and you'll have access to a few extra perks — think concierge assistance, on-site spas and indulgent turndown services. You'll most likely get more amenities and exclusive services at a 5-star retreat, though both are great options for luxury travelers.