The term 'Almost All of Tibet' refers to the Tibetan PLATEAU, which is a large area of elevated land in Central Asia. It covers an area of 2.5 million square kilometers and is the highest region on Earth, with an average elevation of 4, 900 meters. The PLATEAU is home to the Tibetan people and is the source of many of Asia's major rivers, including the Yangtze, Yellow, Mekong, and Indus. It is also home to some of the world's most iconic mountains, such as Mount Everest and K2.