Center City is a very large downtown and holds about 100,000 residents. One of the best downtowns in the country, it holds exclusive shops, restaurants, cobblestone streets, 1600's and 1700's rowhouses, multiple theaters and shopping centers, the famous Independence Mall (which includes the Hall, Liberty Bell, etc), a Chinatown, Society Hill, Rittenhouse Square, and much much more. In the center of Center City is the gorgeous Philadelphia City Hall, standing at 548ft.
