Eifel, Germany Image 2020 (IMAGE) University of California - Los Angeles Caption Water-filled maars in Germany's Eifel region. Credit Martin Schildgen/Wikimedia Commons 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.