11. The highest mountain known to man is the Olympus Mons, which is located on Mars. Its peak is 15 miles (25 kilometers) high, making it nearly 3 times higher than Mt. Everest.
011
11. The highest mountain known to man is the Olympus Mons, which is located on Mars. Its peak is 15 miles (25 kilometers) high, making it nearly 3 times higher than Mt. Everest.
