You can see Mount Everest (theoretically) from a distance of 340 km.
Assuming you are at sea level, with your eyes at 1.6 m above the ground, your horizon (at a distance of about 4.5 km) would cover the entirety of the tallest mountain on Earth only if you are at more than 340 km away from it. Theoretically, you can see the summit of Everest from Bangladesh; however, other peaks cover it! Read more