The Virunga Mountains (also known as Mufumbiro) are a chain of volcanoes in East Africa, in the area where Rwanda, the Democratic Republic of the Congo (DRC), and Uganda meet. The mountain range is a branch of the Albertine Rift Mountains, which border the western branch of the East African Rift. They are located between Lake Edward and Lake Kivu. The name "Virunga" is an English version of the Kinyarwanda word ibirunga, which means "volcanoes". The mountain range consists of eight major volcanoes. Most of them are dormant, except Mount Nyiragongo and Mount Nyamuragira , both in the DRC. Recent eruptions occurred in 2006, 2010 and May 2021. Mount Karisimbi is the highest volcano at . The oldest mountain is Mount Sabyinyo, which rises above sea level. The Virunga Mountains are home of the critically endangered mountain gorilla, listed on the IUCN Red List of Endangered Species due to habitat loss, poaching, disease, and war (Butynski et al. 2003). The Karisoke Research Center, founded by Dian Fossey to observe gorillas in their native habitat, is located between Mount Karisimbi and Mount Bisoke. Virunga National Park, Democratic Republic of the Congo Volcanoes National Park, Rwanda Mgahinga Gorilla National Park, Uganda Michael Crichton's novel Congo is set mostly in the Virunga region. Gorillas in the Mist, and the novel of the same name, document the work and death of primatologist Dian Fossey. The camp from which she operated, Karisoke Research Center, still exists in the Virunga Mountains.