I was on my way to Zion National Park and wanted to check out Glen Canyon Dam, but I did not have a lot of time.
This overlook was perfect. It was free (Horseshoe Bend overlook was $10).
The walk down to the overlook is a bit tricky. Sometimes you are walking on steps and other times uneven sandstone.
But the view is fantastic. You can do some exploring off the path... but just be prepared for the height you are above the river! There are some really good views of the dam and the canyon if you venture around to the other side of the rocks!