Kinzie Street Railroad Bridge

The Chicago and North Western Railway's Kinzie Street railroad bridge (also known as the Carroll Avenue bridge or the Chicago and North Western Railroad Bridge) is a single leaf bascule bridge across the north branch of the Chicago River in downtown Chicago, Illinois. At the time of its opening in 1908 it was the world's longest and heaviest bascule bridge. The previous bridges on the same site included a pedestrian span that was the first bridge across the Chicago River; a second bridge that served as Chicago's first railroad bridge; and a third bridge that was one of the first all-steel spans in the United States.
Kinzie Street railroad bridge
The Chicago Sun-Times, the last railroad customer to the east of the bridge, moved their printing plant out of downtown Chicago in 2000, and the bridge has been unused since. It was designated a Chicago Landmark in 2007. The bridge is lowered once a year and inspected by crew driving a Hi-Rail truck, and is still in "active" status.

(en.m.wikipedia.org/wiki/Kinzie_Street_railroad_bridge)

This bridge connects downtown to north Chicago and is an important part of the city's history and architecture.Built in the 19th century, the North Western Railway Bridge is a masterpiece of engineering. It is also known for its distinctive architecture, which plays an important role in Chicago's history.A visit to this bridge is worthwhile because of the breathtaking view of the Chicago skyline from here. You can see the impressive skyscrapers and the river and get a sense of the size and beauty of the city.You can also take some photos here and be inspired by the beauty of the bridge. It's also a popular spot for walks and joggers, giving you a chance to meet the locals and learn more about their city.From here, you can also explore the Loop district, known for its theaters, shopping, and restaurants. Or you can take a stroll along the Chicago River and admire the city's impressive architectural highlights.