Formation of Ngorongoro Crater
Ngorongoro Crater is found in the Great Rift Valley in northern Tanzania and is one of Africa’s most remarkable wildlife-viewing destinations. The crater forms part of the larger Ngorongoro Conservation Area, a landscape known for its spectacular volcanic scenery, abundant wildlife, archaeological importance, and Maasai pastoral communities.
The formation of Ngorongoro Crater is the result of a massive volcanic event that took place approximately 2.5 million years ago. Ngorongoro was once a huge volcano, possibly comparable in scale to some of the largest volcanic mountains in East Africa. Following major volcanic activity, the volcano’s central magma chamber was partly emptied, weakening the structure above it. The volcanic cone subsequently collapsed inward, creating the enormous caldera that is now known as Ngorongoro Crater.
A caldera is a large, bowl-shaped volcanic depression formed when the ground above an emptied or partly emptied magma chamber collapses. In the case of Ngorongoro, this enormous collapse produced a roughly circular caldera measuring about 19–20 kilometres across and reaching approximately 610 metres in depth. The crater floor covers about 260 square kilometres and contains a remarkable combination of grasslands, wetlands, forests, rivers, springs and woodland habitats.
The Ngorongoro Crater is internationally recognized as the world’s largest unbroken or intact caldera. It forms one of the most important geological features of the Ngorongoro Volcanic Highlands, together with other volcanic craters such as Olmoti and Empakaai. The wider region was shaped by volcanic activity and movements associated with the Gregory branch of the East African Rift Valley.
The Ngorongoro Conservation Area was established in 1959 as a multiple-land-use area where wildlife and Maasai pastoral communities coexist. It was first inscribed on the UNESCO World Heritage List in 1979 for its natural values, while its cultural values were added to the World Heritage listing in 2010 because of the area’s exceptional archaeological and human-evolution record.
The geological history of the area extends far beyond the formation of the crater itself. Volcanic activity began building the Ngorongoro Volcanic Highlands millions of years ago, while later rifting and volcanic processes helped shape the landscape seen today. The inward collapse that formed Ngorongoro occurred during a period of major geological activity approximately 2–3 million years ago, while Olmoti and Empakaai also developed through volcanic processes in the same broader geological setting.
Rivers, Springs and Lakes in Ngorongoro Crater
Water is an important part of the Ngorongoro ecosystem. Several springs and watercourses supply the crater floor, while the central Lake Magadi provides a distinctive feature within the caldera.
Lake Magadi is a shallow, highly alkaline soda lake located in the centre of the Ngorongoro Crater. Its depth varies seasonally and generally does not exceed about three metres. During the rainy season, large numbers of flamingos can gather on the lake, sometimes giving the water a pink appearance when viewed from a distance.
Lake Magadi is also known locally as Lake Makat, with “Makat” associated with the Maasai word for salt. The lake receives water from rivers and freshwater springs within the crater, including the Munge River and springs such as Ngoitokitok. The combination of permanent and seasonal water sources helps sustain the remarkable concentration of wildlife found on the crater floor.
The wider Ngorongoro landscape is surrounded by other volcanic mountains and features, including Oldeani, Empakaai, Ol Doinyo Lengai, Mount Sadiman and Lemagrut. Together, these geological features demonstrate the extensive volcanic history of the region.
Ngorongoro Crater is also considered one of the natural wonders of Africa. The volcanic processes that shaped Ngorongoro were part of a wider period of geological activity that also produced other major volcanic features in the area, including Olmoti and Empakaai craters.
Wildlife in Ngorongoro Crater
The volcanic formation of Ngorongoro created a unique enclosed landscape containing a variety of habitats. The crater floor includes open grasslands, swamps, woodlands, springs and the shallow waters of Lake Magadi. These habitats support a remarkable concentration of wildlife.
During safaris in the Ngorongoro Crater, visitors can look out for elephants, lions, leopards, black rhinoceros, buffaloes, zebras, warthogs, gazelles, hyenas, wildebeests, elands, hartebeests, hippos and many other species.
The Ngorongoro Lengai Geopark notes that the crater is home to more than 25,000 animals, including members of Africa’s Big Five: elephants, buffaloes, rhinos, lions and leopards. The wider Ngorongoro Conservation Area and Geopark support even greater biodiversity, with more than 500 recorded bird species.
The crater’s combination of permanent water, productive grasslands, woodland and steep surrounding walls makes it an exceptional wildlife-viewing environment. Animals are free to move in and out of the crater, although the abundance of food and water means that many species remain within the crater for long periods.
Birds of Ngorongoro Crater
Bird watching is another popular activity around the Ngorongoro Crater. The wider Ngorongoro Conservation Area supports hundreds of bird species, with habitats ranging from highland forests and grasslands to wetlands and alkaline lakes.
Bird species that may be encountered around the Ngorongoro area include black-winged lapwings, ostriches, kori bustards, crowned cranes, rufous-tailed weavers and many others. Flamingos are particularly associated with the alkaline waters of Lake Magadi, where seasonal concentrations can create spectacular scenes.
The wider Ngorongoro Lengai Geopark supports more than 500 bird species, demonstrating the exceptional bird diversity of this volcanic landscape.
Maasai People of Ngorongoro
The Ngorongoro Conservation Area is not only a wildlife destination. It is also a living cultural landscape where Maasai pastoral communities have traditionally shared the environment with wildlife.
The Ngorongoro Conservation Area was established as a multiple-land-use area in which wildlife conservation and traditional Maasai livestock grazing coexist. During safaris around the conservation area, visitors may see Maasai communities and livestock grazing across the highland landscapes.
Cultural visits can provide opportunities to learn about Maasai traditions, pastoral life and local customs. Visitors may visit Maasai homesteads, interact with community members and learn about traditional practices, including livestock keeping, beadwork and distinctive clothing such as colourful shukas.
The Maasai are widely recognized for their pastoral traditions and distinctive cultural identity, including colourful clothing and beaded jewellery. Cultural experiences should be approached respectfully and through appropriate local community arrangements.
Attractions Around Ngorongoro Crater
Apart from wildlife viewing in the crater itself, visitors to the Ngorongoro Conservation Area can explore the Ngorongoro Highlands, crater rim, archaeological sites, volcanic craters, lakes and cultural attractions.
Some of the attractions to look forward to during a visit around Ngorongoro Crater include the following:
Olduvai Gorge
Olduvai Gorge is one of the most important archaeological and palaeoanthropological sites in northern Tanzania. The site is located within the Ngorongoro Conservation Area and is famous for discoveries that have contributed greatly to our understanding of human evolution.
The gorge is nearly 100 metres deep at its deepest point and exposes geological layers containing important fossils and stone tools. Archaeologists and palaeoanthropologists Louis and Mary Leakey conducted decades of research in the area and made major discoveries, including the famous Australopithecus boisei specimen and remains associated with early members of the genus Homo.
During safaris to Olduvai Gorge, visitors can learn more about the area’s archaeological discoveries and human evolutionary history at the museum and interpretation facilities. Some excavation areas can also be visited with an official guide.
Olduvai is sometimes described as the “Cradle of Mankind” because of the extraordinary fossil and archaeological evidence discovered in the area. UNESCO recognizes the Ngorongoro Conservation Area for an archaeological record that spans almost four million years, including evidence from Laetoli and Olduvai Gorge.
Lake Eyasi
Lake Eyasi is a shallow, alkaline lake located in the Great Rift Valley to the southwest of the Ngorongoro Crater. The lake covers approximately 1,050 square kilometres when conditions allow, although its size and water levels vary considerably because it is a shallow, seasonal lake.
Lake Eyasi is particularly well known for its cultural experiences with the Hadzabe and Datoga communities. The Hadzabe are traditionally hunter-gatherers, while the Datoga are pastoralists and are also known for their metalworking skills.
During cultural visits around Lake Eyasi, tourists can learn about local traditions, livelihoods and ways of life. Depending on the community and arrangement, experiences may include meeting Hadzabe families, learning about traditional hunting and gathering practices, visiting Datoga communities and observing traditional crafts.
Apart from cultural interactions, activities around Lake Eyasi can include hiking, nature walks and bird watching. The lake and surrounding Eyasi Basin are also important habitats for a variety of bird species.
Empakaai Crater
Empakaai Crater is a steep-sided volcanic crater located in the Ngorongoro Highlands. It is approximately six kilometres across and was formed through volcanic processes similar to those that created the Ngorongoro caldera.
Empakaai is surrounded by spectacular highland scenery and is particularly attractive for visitors interested in hiking and walking safaris. A trail descends from the crater rim towards Empakaai Lake, providing views across the crater and surrounding highlands.
Wildlife that may be encountered around Empakaai includes waterbucks, buffaloes, bushbucks and blue monkeys, together with numerous bird species. Flamingos can also sometimes be seen around Empakaai Lake.
Ol Doinyo Lengai
Ol Doinyo Lengai is a prominent stratovolcano located south of Lake Natron. Its name comes from the Maasai language and is commonly translated as “Mountain of God.”
The volcano rises to approximately 2,962 metres above sea level and is Tanzania’s active volcano. It is particularly remarkable because it is the world’s only volcano known to have erupted carbonatite lava in historical times.
Hiking Ol Doinyo Lengai is one of the challenging adventure activities available in this part of northern Tanzania. From the mountain, visitors can enjoy views towards Lake Natron, the Rift Valley and the surrounding volcanic landscape.
Lake Natron
Lake Natron is a highly alkaline lake in northern Tanzania, located near Ol Doinyo Lengai. The lake forms part of the Great Rift Valley and is internationally important for the breeding of lesser flamingos.
The shallow, saline and alkaline conditions of Lake Natron create an environment particularly suited to lesser flamingo breeding. The lake and its surrounding wetlands also attract other bird species, making it an important destination for bird watching.
The lake can develop striking reddish and orange colours caused by algae and other microorganisms adapted to its highly alkaline conditions. Its extreme chemistry means that relatively few animals can live in the lake itself, although its surrounding environment supports a range of wildlife and bird species.
Lake Natron is fed by rivers and seasonal streams from the surrounding landscape and is an important ecological feature of the northern Tanzania Rift Valley.
Maasai Villages
Maasai villages are found throughout parts of the Ngorongoro Highlands and surrounding conservation landscape. During safaris, visitors may see Maasai pastoralists grazing cattle and goats across the grassy highlands.
Cultural visits can include visiting Maasai homesteads, interacting with local community members and learning more about Maasai culture, traditions and pastoral livelihoods.
The Maasai have a distinctive cultural identity and are well known for their pastoral lifestyle, colourful clothing and intricate beadwork. Traditional shukas can be seen in different colours and patterns, while beaded jewellery forms an important part of Maasai cultural expression.
A visit to a Maasai community can therefore add a cultural dimension to a Ngorongoro safari, complementing the wildlife, geological and archaeological experiences found throughout the conservation area.
Visit Ngorongoro Crater
The formation of Ngorongoro Crater is one of the most remarkable geological stories in Tanzania. From a gigantic volcano that once dominated the landscape, the collapse of its volcanic structure created an enormous caldera that has gradually developed into a rich ecosystem supporting thousands of animals.
Today, the Ngorongoro Crater combines spectacular geology, abundant wildlife, birdlife, archaeological heritage and living Maasai culture in one extraordinary destination.
A visit offers the opportunity to explore the crater floor, see the alkaline waters of Lake Magadi, enjoy wildlife viewing, explore the Ngorongoro Highlands and discover nearby attractions such as Olduvai Gorge, Empakaai Crater, Lake Eyasi and Ol Doinyo Lengai.
