The Grand Hotel is located on Mackinaw Island, MI, and was built in only 93 days in 1887. At 660 feet, the porch is considered the longest in the world. AAA gives it a 4 Star rating.The Grand Hotel is considered one of the finest hotels in the world. It celebrated it's 130th birthday in July 2017. The first photo is from the 1890s, the third is dated 1915, and the fifth is undated.