According to the International Association of Amusement Parks and Attractions, there are more than 400 theme parks operating in the United States today. That means it won’t be easy to pick out the best one to take your family to. There are a ton of factors to consider, from ticket cost to park size to how much they’re going to overcharge you for a bottle of water inside the park. Well, we want to help. That’s why we’ve put together a breakdown of 10 of the biggest theme parks in the country. Use it to figure out which one will give you the best bang for your buck and give your family the best vacation ever.