About 100 feet (31m) behind this vantage point is The Boeing Company's Duwamish Site, a pair of office buildings that sit on land that used to be the Duwamish Drive-in. I put this in the Seattle pool and the Tukwila pool because I don't know where the city boundary is.
On the far side of the river is the western portion of Cecil Moses Memorial Park, site of a man-made inlet (from the river) for salmon. A view of the bridge from the far side appears in another photo.