Number 10: Castaway Bay
- Location: Sandusky, Ohio (located next to -- and operated by -- Cedar Point)
- Indoor Water Park Square Footage: 38,000
The compact indoor water park features plenty of activities, including the Rendezvous Run indoor water coaster (the resort is run by coaster-crazy Cedar Point after all), an interactive water play center, and a wave pool. Even in the middle of winter, as you gaze longingly at the snowed-in coasters in the distance at the closed amusement park, you could at least have some indoor park fun.
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