On land, Michigan is a unique travel environment. Consequently, drivers should be forewarned: travel distances should not be underestimated. Michigan's overall length is only and width – but because of the lakes those distances cannot be traveled directly. The distance from northwest to the southeast corner is "as the crow flies". However, travelers must go around the Great Lakes. For example, when traveling to the Upper Peninsula, it is well to realize that it is roughly from Detroit to the Mackinac Bridge, but it is another from St. Ignace to Ironwood.