In Maasai, “Oldoinyo Lengai” means “The Mountain of God.” It stands 2962 meters above sea level and provides direct views into the caldera of Tanzania’s only officially certified active volcano and the world’s only carbonatite volcano; eruption records have been kept since 1883, with the largest ash depositing 100 kilometers away in Loliondo on the Kenyan border to the northwest. It is located in northern Tanzania, just south of Lake Natron in the Rift Valley, in the heart of Maasai country, and is considered a sacred mountain by the Maasai. Lake Natron’s hot barren salt flats stretch into the distance as seen from its summit crater. The crater Highlands and the Ngorongoro Crater are to the south. Kilimanjaro dominates the eastern horizons, while the western slopes of the Rift Valley are dominated by forested escarpments and hills. Every seven years, Lengai erupts, spewing plumes of smoke from the crater.