This beautiful State Park in Smithtown, New York is located conveniently in Suffolk County and near several other county parks. Caleb Smith State Park Preserve also has a museum as well as local fishing. Nestled in the heart of Smithtown, Caleb Smith State Park Preserve is one of only two state nature preserves on Long Island. Within its 543 acres are a variety of habitats offering guests picturesque views that change with the seasons.