For the first week, we went to Puebla (name of the state as well as the city). It's about two hours southeast of Mexico City. For the next week, we went to El Rosario, Hidalgo which is about two hours
northeast of Mexico City.
The first week we got to be tourists and go see pyramids, museums, and historical sites (and eat all of their best foods!). The second week we were interpreters for a mission group and helped build Sunday school rooms onto their church. It was two completely different experiences but both were awesome in different ways.