There are few places to go inside the city where you can walk, run and lay on the grass. Arboretum park is one of them. I went there with my wife on a Sunday morning and we took a lovely walk around it. It was full of people, I guess it is a meeting place where Kenyans go to pray or to meet others people. There are huge trees and lot of flowers but it was absolutely dirty. It may be cleaner on Mondays, but on weekends is very dirty.