20,320

The South Peak (I think) of Mount McKinley seen from inside of Denali National Park. It's the highest mountain on the North American continent, and the highest (from base to peak) vertical rise mountain in the world. Everest is of course the tallest, but the base starts at a much higher altitude than McKinley. The row of smaller peaks mid-frame are probably between 3,000 and 5,000 feet, just to put the height in perspective.