Today I got a nice postcard from the USA! The postcard shows a view of the city of Philadelphia with the Benjamin Franklin Bridge in the foreground. Philadelphia is the largest city in the Commonwealth of Pennsylvania and is also the country's fifth most populous city. It covers an area of about 367 square kilometres and has a population of about 1,500,000 people. The Benjamin Franklin Bridge traverses the Delaware River and has a length of almost 3,000 metres. Thanks Susan!