Stone causeway (IMAGE) University of California - Riverside Caption The stone causeway of the solar observatory in Mount Tlaloc, Mexico, aligns with the rising sun on February 23–24, in coincidence with Mexica calendar's new year. Credit Ben Meissner 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.