Mackinac Bridge southbound

The Mackinac Bridge spans the Straits of Mackinac between the Upper & Lower Peninsulas of Michigan between the communities of St. Ignace and Mackinaw City. Built in 1957, the landmark suspension bridge's construction is regarded as one of the great American engineering achievements of the 20th Century. Altogether, the bridge spans about 5 miles of open water and features a centerpiece suspension bridge with a main span of 3,800 ft, supported by towers 552 ft in height.