Alligator's Creek Aquatic Center
✓ Last confirmed for the 2026 season
Where: Civic Park, O'Fallon, Missouri
When: seasonal (summer)
Hours: typically daylight hours
Cost: $10
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O'Fallon's city aquatic center bundles a splash pad with a lazy river, slides, and lap lanes, with toddler admission priced at just a couple dollars. It is the paid step up when the town's free pads stop being enough.