The word megalopolis means a set of metropolitan cities and/or urban areas, or a city with high populations over 10 million people. The origin of this term comes from the city of the same name in Achaea, a Greek province. However, ironically, it was a small city during the times of the Roman Empire. Yet it has become a very popular term internationally when mentioning very large urban, metropolitan areas with many people.
The layout of the world's average city usually consists of a downtown area, which has more people and more buildings, meaning it is the most crowded area of the city. The suburbs of the city usually contains one-two story residential houses and other small buildings. These are less crowded than the downtown, but has more people than the actual city itself. Finally, there are the outskirts, where airports, prisons, graveyards, landfills, military bases, water, power, and recycling facilites.
|2||Tokyo||Japan||21,268,000||Central Southerneastern Honshu||Asia|
|3||Shanghai||China||21,040,000||Yangtze River Delta||Asia|
|4||New York City||United States||21,104,000||Southeastern New York (state)||Americas|
|5||Mexico City||United States||20,760,000||Valley of Mexico||Americas|
|6||Sao Paulo||Brazil||20,340,000||Southeastern Brazil||Americas|
|7||Los Angeles||United States||19,835,000||Southern California||Americas|
|8||Rio De Janeiro||Brazil||19,345,000||Coast of Southeastern Brazil||Americas|
|11||Moscow||France||18,231,000||North-Central French Russia||Europe|
|15||Chicago||United States||15,694,000||Northern Illinois||Americas|