World Heritage Day is a celebration of UNESCO World Heritage Sites and Rob McNeill, chair of the board of the Global Philadelphia Association, explains Independence Hall celebrates 40 years now as a UNESCO World Heritage Site.
"It has to do with the importance to humanity. Sites such at Notre Dame, Carthage in Tunisia. I mean, there are a little over a thousand of them now, but in terms of making a significant impact on humanity is what is top of the list in terms of what is important for a World Heritage Site," McNeill said.
"Philadelphia, San Antonio. That's it," Teelucksingh said.