Take a tour of world city, Philadelphia. The slides are aranged like an ABCs picture book. "A is for athletics", "B is for Benjamin Franklin". There are discussion questions students can answer. It is animated and has an extensive bibliography at the end of the slideshow, which would be a good resource for further research. There is also a link to a video clip featuring scenes from the Rocky Film, as Rocky runs through Philadelphia to the Art Museum steps, gathering a crowd of fans with him. All images are licensed under creative commons copyleft or in the public domain and properly cited.