This was our first time on the sky line at the Oakland zoo and it was amazing. The fare is extra, three dollars per rider but totally worth it. You get to see giraffes, tigers, lions, elephants and camels in their enclosures and then the bison and tule elk were just outside of the fenced area that visitors can presently see. There is a plan to create a “California Trail” for this section so that visitors can walk along and observe the bison, elk, eagles, etc. in the natural Oakland Hills environment. It was of course a bit scary to be carried over a couple of lions with one’s precious child but overall the ride was exhilarating and we liked be up in the treetops and up in the sky with the birds. Also, great views of the bay can be seen! ^_^