Megalopolis

Megalopolis is greek for "large/great city." The five major cities of Megalopolis are: Boston, New York, Philadelphia, Baltimore, and Washington. Today it is a leading center of postindustrial economic activity in the U.S.. Both Megalopolis and Los Angeles have a decline in air quality. They are both also very large and populated areas. Although Megalopolis is more populated. Megalopolis has vacation spots like beaches, parks, and resorts like L.A. does. Homelessness exists in Washington, DC and it is also present in Los Angeles. They both also represent wealth and power in a small area. The cost of living in both areas are very high. There are different racial, ethnic, and socioeconomic groups who live in these areas that can cause tension and creativity to the cities.

Source: 

The Geography of North America, 2nd Edition

Hardwick, Shelley, Holtgrieve