The notable features are Ngurdoto Crater , Momela Lakes , and Mount Meru , which is among the best places to get a great view of Mount Kilimanjaro rising above the clouds. Geological formation of the park is associated with tectonic forces that were also the cause of the formation of the Great Rift Valley, which took place more than 200,000 million years ago. The topography of the park has a large influence to a wide range of vegetations. The slopes of Ngurdoto Crater are covered by the rainforest, swamps and lush savannah at the crater floor, as well as alpine moorland in the slopes of Meru Mountain . The vegetation harbor more than 300 species of birds, some are migratory and others permanently live in the forests.
Birds mostly seen are waterfowls, which are supported by presence of algae in the surrounding lakes.
Huge flocks of Flamingoes can also be seen at Momela Lakes. Arusha National Park is considered to have the largest concentration of the giraffes in the World, other animals include hippo, buffalo, colobus monkey, bushbuck, reedbuck, waterbuck, warthog, Leopards and hyenas. Momela Lakes Momela Lakes are groups of shallow alkaline lakes that are fed by underground streams. They differ in mineral contents and algae that cause the colors of their water also to differ slightly. The mineral and algae present in these lakes attract and support many water birds including Flamingoes and fowls.