Ask someone what the longest tunnel in Michigan is, they'll probably say the Detroit-Windsor tunnel. But we share that tunnel with Canada. This tunnel is the longest one in West Michigan.
This map features nothing but US Highways. Michigan is, of course, always easy to find on maps, so can you do it with just the US Highways in the state?
Mount Arvon in northern Michigan's Huron Mountains has always been considered the highest point in the state. Surprisingly, that high point has been replaced by a pile of mining waste from the Tiden Mine near Ishpeming.