First of all - you've got to bribe the security to let you in and act like you know what you're doing. You have to climb all those floors and the torch comes in handy as it's completely dark. The view from the top is amazing and if you happen to be alone it might be creepy too but exciting!
Bring a bike and bike all the trails and roads. You certainly get to see more than just driving through. The main drive is nice to see the eagle & osprey nests though.
What do you want to see? What are your expectations? This way I can help you make a sample plan for your safari. There are many things to do and see. Wildlife, breathtaking views of Mt. Kilimanjaro, culture and Unique Safari holidays on the Kenya destinations.
Contact me for more tips on your plans.