Lehigh Valley, PA

ZIP code 18003 is a PO-box designation associated with Allentown, Pennsylvania, rather than a conventional neighborhood with clearly defined boundaries. Major attractions therefore cannot be confidently assigned to the ZIP code itself. Allentown’s prominent landmarks include the Allentown Art Museum, PPL Center, and America On Wheels Museum, but these are citywide landmarks and should not be described as specifically located in 18003.