Tanzania

Tanzania was a nation in Africa. It was the location of the Rift Valley (PROSE: Genius Loci) and the Kilgai Gorge. (PROSE: Genocide)

Tanzania's flag was green and blue with a thick black and yellow stripe along the middle. The Tenth Doctor briefly considered planting a Tanzanian flag on the Moon's surface, but instead decided on a Women's Institute flag instead. (PROSE: I Am a Dalek)

Behind the scenes
In the real world, Tanganyika and Zanzibar became of Tanzania in 1964. However, Tanganyika is an independent country decades after that in the Doctor Who universe. (AUDIO: The Sentinels of the New Dawn)