The World Of VOLCANOES, like mountain.
Mauna Kea is a volcano in Hawaii.
Its bottom is on the seabed. Count from there it is 1,345m (4,937ft) higher than the Mount Everest.
The highest volcano in the solar system is Olympus Mons at 26,378m (88,150ft) high.
Olympus Mons is in planet Mars.