Tibetan Yeti

Tibetan Yeti, also known as  Abominable Snowmen, were anthropoid creatures native to Earth. Robotic semi-replicas of the species were constructed by the Great Intelligence. They dwelt in the Himalayas in Tibet.

Little was known about them, except that they were large, furry, probably semi-sapient humanoids and naturally timid.

They were generally thought to be myths by Humans from the West. Professor Travers went on an expedition to find them. After an adventure with the Robot Yeti, Travers finally spotted one and went in pursuit. (DW: The Abominable Snowmen)

Behind the Scenes
Because of the "wiping" of The Abominable Snowmen from the BBC's archives, no photographic documentation of a Doctor Who "real" Yeti exists. Doctor Who historians believe that the production team merely used one of the same costumes as one of the robot Yeti, with some of the padding removed.

SJA: Eye of the Gorgon includes a dialogue reference to a sultan who had seen a Yeti. It's not known if this refers to a "real" Yeti or the robotic version.