Hi I have a trip that ends in Arusha and I have a day and a half before my flight leaves from Nairobi. In reality I have one extra day since half of a day will be spent traveling to Nairobi. Any recommendations on how to spend that day? My tour includes Arusha, Lake Manyara, Serengeti, Ngorongoro Crater, Olduvai Gorge. I was considering Arusha National Park or perhaps head back to Nairobi and see either the animal orphanage or giraffe center? Any suggestions would be greatly appreciated.