Dormant volcano Ka ##ki on the Big Island is the highest mountain in the state . Drive up the flank of Maui 's volcano Haleakala to see the surreal , lunar - like landscape . Numerous helicopter companies make up - in - the - air jaunts over Kaua ' i .
Dormant volcano Mauna Kea on the Big Island is the highest mountain in the state . Drive up the flank of Maui 's Mt Haleakala to explore the surreal , lunar-like landscape . Numerous helicopter companies offer up-in-the-air jaunts over Kaua ' i .