If your trip to Arnolds Park is all sorted out but your itinerary is a little on the empty side, we can give you a few hints and tips.Stop by 'Boji Splash Indoor Waterpark Okoboji. It's one sight you'll find on most travelers' must-do lists. If you still have some room on your schedule, Emerald Hills Golf Course and East Okoboji Lake will keep you amused too.