A local favorite, Indy Island is a year-round indoor waterpark located near Raymond Park off East Raymond Street on the southeast side of the city. Indy Island is the perfect destination for birthday parties, boasting two different party packages for groups up to 11 in size. This waterpark is open on Mondays, Wednesdays, Fridays, Saturdays and Sundays. Typically, hours are limited during the week, so it is probably best to visit this waterpark on the weekend. Visitors love the park’s waterslide, zero-entry pool and three-lane swimming pool.