Mountains of the world - Tallest

Mount Everest 8850m (29035ft) Nepal/China
Qogir (K2) 8611m (28250ft) Pakistan
Kangchenjunga 8586m (28169ft) Nepal
Lhotse 8501m (27920ft) Nepal
Makalu I 8462m (27765ft) Nepal
Cho Oyu 8201m (26906ft) Nepal
Dhaulagiri 8167m (26794ft) Nepal
Manaslu I 8156m (26758ft) Nepal
Nanga Parbat 8125m (26658ft) Pakistan
Annapurna I 8091m (26545ft) Nepal

The dormant volcano Mauna Kea (on the Big Island of Hawaii) could be considered the tallest mountain in the world. If you measure it from its base in the Hawaiian Trough (3,300 fathoms deep) to its summit of 13,796 feet, it reaches a height of 33,476 feet.