Detroit Windsor Tunnel

One of the huge draws about visiting Detroit is the ability to zip through the auto tunnel 75 feet below the Detroit River to Canada. It's an architectural wonder about a mile long that was built between 1928-1930. The US and Canadian flags rest side by side on the wall at the midpoint. After the Ambassador Bridge, it's the second busiest crossing between Canada and the US with on average 25,000 cars using it daily. The first car through in November of 1930 was a 1929 Studebaker.