Large zoo that's still very walkable with some par...

Large zoo that's still very walkable with some particularly nice areas - the Congo area and the butterfly garden - but both of these as well as a few more areas require an additional entrance fee. Not sure I'd give the zoo 4 stars with just general admission. We went on a "free" Wednesday (extra areas not free) which was also a school holiday and while the zoo was busy it didn't feel crowded. Bring your own snacks. They do sell food but that part of the zoo seemed pretty mismanaged, with food running out/limited selection available right in the heart of lunch time.