I found this article to be pretty intriguing.

There is a group of people in Philadelphia currently working on the future and healthy well-being of Lower South Philadelphia. Where exactly is Lower South Philadelphia? In other words, what are its boundaries?

This area includes the following sections/neighborhoods:

1. Navy Yard
2. South Philadelphia Port
3. Sports Complexes
4. Packer Park
5. Grays Ferry (a portion of it)

There are only 5,000 residents in this entire area of Philadelphia, but 15,000 people work here; that makes it important. Read on to learn more.