Philadelphia is the largest city in the US state and Commonwealth of Pennsylvania, and the sixth-most populous US city, it is also one of the oldest municipalities.
Philadelphia's history attracts many tourists, with the Independence National Historical Park, which includes the Liberty Bell & Independence Hall.
Philadelphia is home to many national historical sites that relate to the founding of the United States. Independence National Historical Park is the centre of these historical landmarks being one of the country's 22 UNESCO World Heritage Sites.
View high resolution image in natural color (JPG 5.9 MB)
View high resolution image in false color (JPG 7.0 MB)