This place is gorgeous! They have an amazing array of plants and flowers and then, after you're done, you can have some delicious tea and look out at a koi pond.
This is part of the famed Grand Canyon Rim-to-Rim hike. While it may be the Grandaddy of hikes, it's not for everyone--the Canyon can be relatively punishing so just make sure you're prepared.
agreed with peter. don't take this zoo for granted. it craps on our LA zoo, no joke. don't sleep on this if you haven't been. pay for the sky ride/bus tour, it's worth it -- see animals while you hop from one side of the park to the next.