outer wall of Royal Tomb (IMAGE) PNAS Nexus Caption Northeastern corner of the outer wall of Royal Tomb Complex of Nan Madol. Credit Chuan-Chou Shen Usage Restrictions None License Original 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.