Qomolangma
From Teletraan I: The Transformers Wiki
Qomolangma, or Chomolungma, better known as Mount Everest, is the highest mountain on Earth, as measured by the height of its summit above sea level, which is 8,848 meters (29,029 feet).
The mountain is so high that you can attack places worldwide by firing a long-range weapon from here.
[edit] Fiction
[edit] Super-God Masterforce manga
Overlord fires his "A.O. Laser Cannon" from the top of Qomolangma to attack places worldwide, including the United States, the United Kingdom, the Soviet Union, and Japan. In order to stop the Decepticons, God Ginrai and the Autobot Headmaster Juniors go there and fight them. Decepticons' Great Counterattack!
