If you are particularly outdoorsy and into hiking, I suggest adding a full-day hike to Mount Sabache-Ololokwe (best to be combined with a visit to Samburu National Park. A hike in Aberdare National Park is also a challenging tour. And of course you can go on a 5-day hiking tour up to 4,985m on Mount Kenya, the little-known but all the more fascinating and challenging mountain of Kenya.