Harbor Springs, MI

ZIP code 49740 covers Mackinac Island, Michigan, a picturesque island in Lake Huron known for its historic architecture and lack of motor vehicles. The area is home to iconic landmarks such as Fort Mackinac, built during the American Revolution, and the Grand Hotel, a Victorian-era resort with sweeping views of the lake. Visitors can explore the island's charming streets, enjoy horse-drawn carriage tours, and indulge in famous fudge shops.