Air Above Water

It's located right outside of Columbia, SC.  Off the Riverbank Zoo exit

 

Going down I-20 toward Columbia, get off the riverbank zoo exit and bare to right.  Go over the bridge over the interstate and take the 2nd left.  Then take the 1st left into the apartment complex.  Drive up about half way through the apartments until you see a break in the 2 apartment buildings.  Walk down the wooden steps until you see the pond and turn to your right and walk down the path until you come to the cliff, which is a ledge about 4 feet wide.  Then you jump off! 

 

The cliff is 25 feet high.  cliff is about 15 feet wide, and the water is at least 40 feet deep.  You have to swim about 20 feet around the cliff to climb back up.