Old Faithful and surrounding areas. We walked until we couldn't walk anymore. We visited the visitor center, the Old Faithful Lodge, the Old Faithful Inn and walked some of the paths. We didn't get clear out to the Morning Glory pool, but a grizzly was spotted at the pool when we would have been out there so it probably worked out for the best.
The grizzly bear that we saw on the side of the road and all of the stupid people that got out of their vehicles and ran toward it for a picture. We were smart and stayed in our vehicles as we drove by.
The fishing bridge although you can't fish off of it anymore because of the endangered Yellowstone trout.