I was going through some old folders and found pictures from a trip to Mexico. This picture is from 40 years ago and I am still amazed at how the people of that time period were able to build this structure. It is the Pyramid of the Sun at Teotihuacan Mexico. This pyramid is the 3rd largest in the world. I wonder what happened to the people of this grand city some say a disease wiped them out. Is it happening again or could it happen again? https://www.ctptalk.com/ctp/@darmst5339/iaac-day-99-going-back-in-time #Iamalivechallenge