Africa

Africa was an Earth continent. It was home to lots of animals, including lions, elephants, gazelles, buffalo, zebras and rhinos. (PROSE: Prelude Birthright) It was the ancestral home of the mammoth and the human. (PROSE: Timewyrm: Apocalypse)

History
The Doctor had encountered early hominids on the plains of Africa over a million years before the dawn of human civilisation. (PROSE: Timewyrm: Apocalypse)

John Riddell hunted big game in Africa in the early 20th century. (TV: Dinosaurs on a Spaceship)

In the 1970s, the Third Doctor briefly materialised in Africa while attempting to go to Bombay. (PROSE: Island of Death)

Martha Jones' fiancé Thomas Milligan worked as a paediatrician in Africa. Eight people in Africa were killed when Luke Rattigan tested his ATMOS system to see if it could successfully release clone-feed gas; their deaths, along with 44 others in different countries, prompted an investigation by the Unified Intelligence Taskforce into ATMOS to determine its origin. (TV: The Sontaran Stratagem)

Martha Jones told Plummer that she wished to visit Africa. (TV: Reset)

According to Ianto Jones, North Africa was one of the first areas the Daleks landed in the start of the War in the Medusa Cascade. As they were attacking military areas, the RAF there attempted to retreat. (TV: The Stolen Earth)

In 2010, Santiago Jones' mother went to Africa to find shell flower plants. (TV: Death of the Doctor)

In the 2010s, West Africa was among the places where newly-hatched Zygons were settled across the world as part of Operation Double. (TV: The Zygon Invasion)

Following the plague sent by the Daleks during their 22nd century invasion of Earth, the majority of the population of Africa died before a cure was found. (TV: The Dalek Invasion of Earth)

In the early 27th century, the President of Africa was one of the five co-existing Presidents of Earth. (COMIC: Masters of the World)

During the Ice Age of the year 5000, scavengers were evacuated to rehabilitation centres in Africa. (TV: The Ice Warriors)

Birds from Africa were on board the Ark in circa 10,000,000. (TV: The Ark)

Alternative timeline
In an alternative timeline in which Nazi Germany won World War II as a result of the Seventh Doctor and Ace accidentally leaving laser technology in Colditz Castle in October 1944, Africa eventually fell, with the Mau Mau Uprising of 1953 against Nazi rule in Kenya. The Luftwaffe was sent in immediately. On the orders of the Führer Adolf Hitler, they proceeded to carpet-bomb the tribal areas and wipe out most of the native population. (AUDIO: A Thousand Tiny Wings)

Other references
According to the Tenth Doctor, the food hall of the Cosmomart was the size of Africa. (COMIC: Supremacy of the Cybermen)