SUMMER SAVINGS! Enjoy unlimited admission to Illinois’ Largest Waterpark all summer long. For a limited time, get the rest of 2021 and all of 2022 for one great price! Hurry, offer ends August 31! Buy Today! All tickets and season passes are subject to an online convenience fee and 5.75% municipal fee. Available online only. No refunds, transfers, or upgrades after initial purchase of the season pass.