March 16, 2023; Notre Dame students (left to right) Emma Campbell, Helen Nguyen, Paulina Rosiles, and Yuhan (Hannah) Liu have their photo taken during a tour of Teotihuacan, also known as the City of the Gods, an archeological site northeast of Mexico City. Teotihuacan is home to some of the largest ancient pyramids in the world. (Photo by Barbara Johnston/University of Notre Dame)