If your trip to Mexico City is all locked in but your itinerary is looking a little empty, we can give you a few hints and tips.You might need to ask the boss for some more time off, because Mexico City is overflowing with unmissable sights and landmarks. Make a start at Plaza de la Constitucion and Zocalo. Don't miss Metropolitan Cathedral and Palacio Nacional either.You'll have to jump out of bed early if you're planning to check out all the interesting sights this place has to offer. Ayuntamiento and Templo Mayor are no-brainers. Palacio Postal and Teatro Diego Rivera can't be missed either.Close to the center, Plaza Garibaldi is one attraction you might like to put on your to-do list. Arena Mexico and Parque Delta are also a stone's throw away and worth checking out.