Shay Park is a small, quaint and mostly undeveloped park located in the downtown district, east of Judd Street between Main and Bay Streets. The park is owned and operated by the City of Harbor Springs and hosts a permanent outdoor exhibit of a historic steel yacht, the Aha. The Aha is a 50' vessel and one of the largest artifacts in the collection of the Harbor Springs Area Historical Society.
In 2021, the Historical Society finished a complete restoration of the steel watercraft and the boat was installed in Shay Park alongside two interpretive panels. Named in honor of inventor Ephraim Shay, the Shay Park was once home to Shay's machine shop and the city's first waterworks plant and reservoir. Today, the only building that remains of the original "Shay Complex" is Shay's hexagon house across the street.