 Harrison Spring is located west of Corydon ; it is 60 feet ( 18 m ) in diameter and is over 4 @,@ 000 feet ( 1 @,@ 200 m ) deep , making it the largest and deepest spring in Indiana . It rises from a solid rock in a level spot of land , and it outputs enough water to have turned flour mills in the past . Is the largest spring by volume in Indiana producing over 3 million gallons of water daily . The spring derives its name from William Henry Harrison who once owned the land surrounding it . 
