Step 1 : Introduction to the question "Where is the mackinac bridge located?"
The Mackinac Bridge is a suspension bridge spanning the Straits of Mackinac to connect the Upper and Lower Peninsulas of the U.S. state of Michigan. Opened in 1957, the 26,372-foot-long bridge is the world's 20th-longest main span and the longest suspension bridge between anchorages in the Western Hemisphere.