The drive along Yellowstone Lake is awesome! It just cannot be captured in a single photo... there are spots with geo-thermal activity, a unique sign that you're in Yellowstone.
Pelicans were cruising along Tower Creek; we only saw a couple others during our visit.
The Lower Falls is a must-see at the park; it's one of few things I recall of my first visit over 30 yrs ago. You can hike to the edge of the drop..the tiny square shape at the right edge is a group of people. There was no way I was hiking down that steep trail.