The Forest of Kestheven was a region of deciduous woodland located on Hyspero. It was also known as Kssven, Kest, Cha'vin, Kaastn, and Keeisht.
After leaving the Four, Major Angela declared herself queen of Kestheven and its bears. The Eighth Doctor, Iris Wildthyme, Sam Jones and Gila visited Kestheven as part of their quest to reassemble the Four and successfully recruited Angela. (PROSE: The Scarlet Empress)