Philadelphia, PA

ZIP code 19106 covers parts of Philadelphia’s Old City and Society Hill, near the Delaware River. Its best-known landmarks include Independence Hall, the Liberty Bell Center, and the National Constitution Center, all associated with the nation’s founding. The area also contains the Museum of the American Revolution, Betsy Ross House, and Elfreth’s Alley, a historic residential street. Restaurants, shops, offices, and homes occupy the surrounding blocks.