The bases of mountain islands are below sea level, and given this consideration Mauna Kea (4,207 m (13,802 ft) above sea level) is the world's tallest mountain and volcano, rising about 10,203 m (33,474 ft) from the Pacific Ocean floor.
Makalu is the fifth highest mountain in the world. The dramatic four-sided, pyramid-shaped mountain rises 14 miles (22 kilometers) southeast of Mount Everest, the highest mountain in the world, and Lhotse, the fourth highest mountain in the world, in the Mahalanger Himalaya.
The highest mountains above sea level are generally not the highest above the surrounding terrain. There is no precise definition of surrounding base, but Denali, Mount Kilimanjaro and Nanga Parbat are possible candidates for the tallest mountain on land by this measure.