Hike in Udzungwa to the Sanje waterfalls. This national park doesn’t have any paved roads, so it’s great for both short and long walks. The four-hour walk to the Sanje waterfalls is both hard and fun. You have to climb up a mountain, but at the bottom of the waterfall, you can cool off. You might see a rare monkey in the woods or even elephant tracks (from so-called mountain elephants) along the way. Remember that it can get hot in the middle of the day, but this is a great walk as long as you stay in the shade and drink water.