Hike to the Mount Meru Waterfalls, In Arusha, one of our favorite things to do is go on a hike to the springs on Mount Meru. The second-highest mountain in Tanzania is Mount Meru, which is right next to Arusha National Park. The first is Mount Kilimanjaro. It’s an inactive volcano with very rich earth on its sides. Along the way, you can see many pretty flowers, plants, monkeys, and birds. A guide who speaks English is with you the whole 30 minute hike to the waterfall.