The Tibetan plateau was a geologic feature on the planet Earth on the continent of Asia. The plateau was located on the northern side of the Himalayan mountain range, which featured the point of greatest altitude on the planet, Zhumulangma or Everest. Beyond the plateau were deserts and the steppes of central Asia, while to the south of the Himalayas lay the subcontinent of India.
In the holoprogram Julian Bashir, Secret Agent, Dr. Hippocrates Noah acquired precious jewels such as rubies from the hydrothermal deposits located in the Tibetan plateau. The deposits contain large amounts of chromium, which in turn accumulate on the rubies, giving away their original location. (DS9: "Our Man Bashir")