Turibus
We took the Turibus around one of the two circuits that it does of the city. One is of the historical center (21 stops) and the another South Circuit (15 stops). You have to change trains in Fuente de la Cibeles. The advantage is that, in no time you can get to the southern part of the city. And you can get off at any stop and then jump back on. We got off at the Chapultepec Castle but with more time I would have loved to get off at Frida's house and go to the museum of anthropology, etc.. The Federal District is very convenient if you have little time. On the Internet, you can find all the details