Asia is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres. It shares the continental landmass of Eurasia with the continent of Europe and the continental landmass of Afro-Eurasia with both Europe and Africa.

Asia’s interior consists of mountains, plateaus, and intervening structural basins. The continent’s physiographic system focuses on the Pamirs, a towering plateau region located where the borders of India, China, and Afghanistan converge. It is known as the Roof of the World. Mountain ranges spiral out from the Pamirs to the west (Hindu Kush), and southeast (Great Himalayas). These ranges form an imposing eastern-western arc, about 2500 km (about 1550 mi) in length, that contains numerous peaks of heights well more than 6100 m (20,000 ft), including the highest peak in the world, Mount Everest. Other ranges extend east and northeast of the Pamirs (Karakorum, Kunlun, and Tien Shan). Between the Himalayan system and the Karakorum-Kunlun ranges lies the high Tibetan Plateau. Around this central core are arrayed four major plateau regions (Siberia, eastern China, southern India, and the Arabian Peninsula) and several major structural basins and river plains.