The Hole in the Rock seems really far up but don't be fooled. It does not take long to get to the hole, maybe a 5 minute walk. There is a nice path that takes you right up to it.
The views from this are beautiful. I recommend this place if you want a nice stroll and some awesome views.
It took us a while to find the entrance. Just turn into the zoo and then make a left at the first entrance on the left that you see.