@JigerofLemuria It is just behind the penguins. Easily missable. I missed it on my first visit in 2015 but after looking on ZooChat I found out where to look. Spotting the bison is the next hardest job!
The high fence surrounding Bison hill would be the original- probably just about the only original fence still enclosing a paddock in the park, though there are other sections you can still find here and there.
