One can come by air, train or car, either way, Philly, so called by locals, is easy to navigate in, and parking is not too serious.
Car rentals can be expensive, so keep that in mind.
As always, with time being critical, one must choose their sites carefully.
Not everyone knows that between 1790 and 1800, Philadelphia,served as the new nation's capital.

• Independence National Historic Park
• Declaration House
• Carpenters Hall
• Betsy Ross House
• Elfreth's Alley
• Independence Hall
• Liberty Bell
• The National Constitution Center
• Franklin Court

1. Independence National Historic Park - Called the most historical mile in America, it contains the Independence Hall and the Liberty Bell as well as several other exhibits.
   
2. Declaration House, built in 1775 and rented by Thomas Jefferson, where on the second floor, he wrote the Declaration of Independence.
   
3. Carpenters Hall was the site of the First Continental Congress in 1774, also being part of the Independence National Historic Park.
   
4. Betsy Ross House, the traditional home of Betsy Ross, who sewed the first Stars and Stripes flag together.
   Unfortunately, there is no guarantee that this was the actual house; however,well decorated and well worth the visit.
   
5. Elfreth's Alley contains some of the oldest homes in Philadelphia.
   Often called the oldest street in America, over 3,000 residents lived here.
   
6. Independence Hall, the location of the signing of the Declaration of Independence and The Constitution, is also in the National Historic Park.
   Today the area is a peaceful setting, but during those early debates, it was anything but calm.
   Because of security, currently closed.
   
7. Liberty Bell, cast in England, soon cracked after arriving in Philadelphia.
   No one knows for sure how the bell cracked, but remains silent after at least twice.
   Today the symbol of freedom stands roped off due to security.
   That could change, but keep in mind for your visit.
   
8. The National Constitution Center contains memorabilia and exhibits of America's history.
   Including a multimedia presentation, as well as Signer's Hall, this includes 42 life size bronze statues of the signers of the Declaration.
   
9. Franklin Court is the place where Benjamin Franklin's house once stood.
   Today a steel frame construction stands and one can have their letter stamped with Franklin's original postmark.
   

Whether one has a day or a week, one will certainly not regret the time spent in this wonderful, historic city.
There are many towns and villages around Philadelphia that are also filled with historical sites, that are well worth a visit.