Hiram M. Chittenden Locks: boats waiting to get into Puget Sound from Lake Union.
The Before: Boats waiting for the water to rise so they can head into Puget Sound. Depending on how busy the locks are that day, they could be waiting for hours in this cramped space!
The After: The picture is taken from the exact same place (notice the yellow line). The water has been added and now the boaters are preparing to go into Puget Sound. It's quite complicated to get going because of all the connections. Big boats are on the outside, and are tied to the docks, while smaller boats are in the middle and tie to the bigger boats.