Many cities are built on or across rivers. It's always interesting to see how various cities deal with the river and making it part of the city.
Often, industrial and warehouse districts were located along the riverfront, making it a fairly unappealing place. Freeways were also often located along the riverbank, which meant that residents could not reach the riverfront, but could only look at it from afar. Although it's a difficult process to undo, many cities decided to reclaim their riverfront property for waterfront parks and commercial uses.
And then there's Columbus, Ohio. Are there other cities like this? There was a big flood in Columbus, Ohio in 1913. After that, city leaders decided to widen the river and build retaining walls, based on a recommendation from the Army Corps of Engineers. During the building boom of the 1920s, the Civic Center was built on both sides of the river. It strikes me as very unusual and ahead of its time.