Don Juan Pond (image) University of Washington Share Print E-Mail Caption The liquid in Don Juan Pond is almost 45 percent salts by weight. It is in Wright Valley, one of the Antarctic valleys where the air is very cold and dry. Credit Pierre Roudier/Flickr Usage Restrictions With credit Share Print E-Mail 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.