Way back in August - while we were in Kenya - we visited the Nairobi National Park. It's about 15 minutes from downtown but, if you are facing away from the clearly visible skyline, feels like you are out on the Masai Mara. We took a trip there one morning and all agreed that we could have stayed for days. It's just so beautiful.
Over 45 square miles of open land you can pretty much see any animal you'd expect to find in Kenya (with the exception of the elephants) as they roam freely and mix together. It's a rhino sanctuary too - although we heard it's rare to see a rhino.
This is a little video I put together of our visit. I thought I'd put a song over it - but some of the sounds are just too precious. (Listen to Owen as he watches out the window.)