I lived in Mexico City for two years, and could easily have stayed longer. There are an infinite number of things to do – museums, restaurants, bars, parks, people watching… it goes on forever. Also, each neighborhood within the city is totally different from the next; it is impossible to get bored. The city has vibrant nightlife, diverse markets, delicious food (street and restaurant), beautiful architecture, great travel opportunities… but whatever I say can’t really capture the essence of the city. Put it to the top of your list of places to go.