It’s near the stadium. We saw it when we toured and finally got the story behind a ram being the mascot of the Tar Heels!
Northwestern
Jack “The Battering Ram” Merritt.
Ski, you have to find a way to monetize your college photo identification excellence 
…that was a pretty obscure NU photo!
University of North Carolina
Not really, IMO. Shakespeare Garden is pretty iconic.
I was nearing the end of my Kellogg time before I even knew that was there!
I have a soft spot for garden design. I could not do it myself to save my life, but I admire those that can.
Vassar
Yes, it’s atop the entrance to Dillon Gym at Princeton. From left to right, Tiger jumping on a shield, Literate Ape and Football Player with a Ball.
I believe you have now effectively killed the thread 
Had a feeling this one’s easy for you, but knowing its exact location, Dillon Gym, is impressive. 
No guesses for my two more obscure ones?
Well, actually one is not very obscure at all if you know the school. It’s pretty iconic. Both schools that do get talked about here on CC.
The second one is UNC. I did not respond because there were many UNC photos posted
I have no idea on the first one.