© Ufficio stampa|Bartrams Covered Bridge – Credits Chester County

© Ufficio stampa|Covered Bridge Larkin.  From George Conn

© Ufficio stampa| Frank Knox, Valley Forge

© Ufficio stampa|Speakman Bridge 

© Ufficio stampa|Glen Hope Bridge

© Ufficio stampa|Mercer’s Mill 

© Ufficio stampa|Frank Rapps Dam Bridge

© Ufficio stampa|Il ponte Frank Kennedy

© Ufficio stampa| Linton Stevens  Bridge

© Ufficio stampa| Sheedal Hall Bridge

© Ufficio stampa|Pine Grove Bridge 

© Ufficio stampa|Smith Bridge

© Ufficio stampa|La mappa dei ponti