Cloudy Day on the Thessalian Plains (IMAGE) University of Gothenburg Caption The city's acropolis is barely visible during a cloudy day on the Thessalian plains. Credit SIA/EFAK/YPPOA Usage Restrictions None License Licensed content 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.