Unless you have a month and a million dollars to spend, taking in all of Mexico City is going to be out of the question. What the first time visitor can do is, hit the high spots. Tours are, of course, a great way to get a cross section of any famous city. Some key attractions you must see include; Castillo de Chapultepec, the Teotihuacan Pyramids, Torre Latinoamericana, Monumento a la Independencia, and Cerro de la Estrella, just to touch the surface.