Arusha National Park is one Tanzania’s smallest (322 sq km) but most beautiful and topographically varied northern circuit parks. It’s dominated by Mt Meru , an almost perfect cone with a spectacular crater. Also notable is Ngurdoto Crater (often dubbed Little Ngorongoro) with its swamp-filled floor. Wildlife is present, but for the most part it's a sideshow to the scenery and the trekking and climbing possibilities.