We have a long layover of about 10 hours in Mexico City on June 12th and would like very much to visit the Piramidi di Teotihuacan. Can anyone who has visited on a layover pls kindly show us how we can get transportation from Mexico City International Airport to the Piramidi and back to the airport? How long will we need to visit the Piramidi inc. travel time? Can we buy tickets there with credit card so we don't have to exchange for Pesos? Any help you could give us is VERY MUCH APPRECIATED. Thank U in advance.