When arriving in Arusha, Mt. Meru is the first thing visitors will see. At 14,990 ft. tall, it is the second highest peak in Tanzania (after Mt. Kilimanjaro). The Mt. Meru Waterfall hike will lead you down a lush jungle stairway, through a vibrant gorge, along clear rainforest streams, and eventually, right up to a powerful waterfall that you'll hear from a mile away.