Cave-In-Rock State Park (Illinois).

Located in Southern Illinois, right on the mighty Ohio River, and just outside the tiny village of the same name, lives Cave-in-Rock State Park. It's a free state park, open daily from 8am to 9pm. In fact, ✨it's Illinois' first state park✨. Officially established in 1929, it's been recognized as a Southern Illinoisan tourist landmark …

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