Mexico City, Mexico, illustrates the word
megalopolis. Mexico City is one of the world's most populous cities, at the same time modern and cosmopolitan yet sprawling and ramshackle. Its industry, traffic (with accompanying smog), hotels, restaurants, museums, architecture, historic sites (both Spanish and Aztec) and performing arts are everything you'd expect of a world-class city.
However, Mexico City's poverty-stricken neighborhoods are textbook illustrations of the problems encumbering developing nations. Although Mexico City does present challenges for visitors, its rewards make a visit well worth the effort. Those who do dive into the fray often become addicted to the city's energy and attractions.