I definitely recommend Sandcastle on some hot summer day. You'll have an absolute blast. Sandcastle has tons of water slides. It also has a lazy river so you can just relax and work on your tan. They have a pretty good deal on season passes so if you think you'll want to go back again, I'd recommend that option. If possible, try to avoid peak times (go on weekdays or late in the season) to avoid the crowds.
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