Deep Lake (image) University of New South Wales Caption This is Deep Lake in Antartica. The water in the 36-metre deep lake is so salty it remains in liquid form down to a temperature of minus 20 degrees Celsius. Credit UNSW Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.