Mauna Kea, Big Island, Hawaii
Mauna kea is the highest peak on the Big Island. It is 4,207 m (13,802 ft) above sea level but measured from its base together with the underwater part, it is over over 10,000 m (33,000 ft) tall and is the tallest mountain on Earth. Thanks to its high elevation, dry environment and stable weather conditions, Mauna Kea's summit is one of the best sites in the world for astronomical observations. Since the creation of an access road in 1964, thirteen telescopes funded by eleven countries have been constructed at the summit.