what is the tallest mountain in the world?
United States Hawaii. Mauna Kea (White Mountain) on the island of Hawaii, USA, is the world's tallest mountain. Measured from its submarine base in the Hawaiian Trough to its peak, it has a combined height of 10,205 m (33,480 ft) of which 4,205 m (13,796 ft) are above sea level. Pic: Alamy.