Known as ‘Kilimanjaro’s little brother’, Mount Meru is the second highest mountain in Tanzania, offering amazing views of nature and wildlife. This four-day trek requires a good level of fitness, but travelers will be rewarded with mesmerizing views of the African savannah, as well as experiencing luscious canopies and the unforgettable U-shaped crater of the summit. Mount Kilimanjaro is even visible in the distance.