The image depicts a diagram of a waterway, specifically a river or canal, with a lock at its end. The lock is located in the middle of the river, and it appears to be a part of a larger waterway system. The lock is connected to the Atlantic Ocean on one side and Gatun Lake on the other side. The lock is depicted as a rectangular structure with vertical walls, suggesting that it is a hydraulic lift used to raise or lower boats or ships. The surrounding area is green, indicating vegetation or grassy terrain, and the waterway is depicted with blue and green colors, representing the water and the surrounding landscape.