I visited the Fort Worth Zoo the last time I was in Dallas. It was a toss up on which zoo to visit. Will have to visit the Dallas Zoo next time I am in town.
I've been meaning to get out to the Dallas Zoo (I prefer the Ft Worth zoo, but it's been too long since I've been to either), but had to settle with the Phoenix zoo instead last week.
My favorite image is the first one, of the lion nestled up in the rocks, but I agree ... they're all great images.