Grand Hotel (In Michigan) The Grand Hotel has stood on Mackinac Island since 1887. It boasts the world's longest porch. Enjoy views of the Straits of Mackinac from its spacious open design. Inside, there are 393 uniquely decorated rooms. The charming hotel is also known for its scrumptious meals. It is also known and a family friendly destination with discounted rates for children. Puzzle measures 24" x 18" 500 piece.