Aqua Grand Mackinaw Inn & Waterpark Maps page on i4mackinawcity.com, Aqua Grand Mackinaw Waterpark is located in Mackinaw City, Michigan and is a 2 star rated hotel. This page shows the map of Aqua Grand Mackinaw Waterpark. Use this to see the location of Aqua Grand Mackinaw Waterpark and directions from nearby landmarks.