Engaruka is a significant archaeological site located on the eastern edge of the Ngorongoro Conservation Area, roughly halfway between Mto wa Mbu and Lake Natron. Dating back 300 to 500 years, the ruins reveal the remains of a once-thriving agricultural settlement that developed a sophisticated irrigation and terracing system using stone-lined channels—an advanced technique for its time in East Africa's semi-arid environment. Though much of the stonework has eroded into indistinct mounds, the layout of fields, canals, and terraced homesteads still reflects a high level of planning and adaptation to the local landscape.
The site's origins remain debated. Some archaeologists believe Engaruka was built by the ancestors of the Iraqw people, who now live near Lake Eyasi, while others suggest the Sonjo people may have been responsible. Visitors today can explore the site with the help of local guides based at the Engaruka Ruins Campsite or through the Engaruka Cultural Tourism Program, which also offers treks to nearby Mount Kerimasi and visits to surrounding Maasai communities. The setting at the base of the Great Rift Valley escarpment adds dramatic geological context to this historically rich but little-known destination.