Philadelphia, Pennsylvania’s biggest city is known for its magnificent history, which includes Independence Hall, where the Declaration of Independence and Constitution were signed in 1776, together with many other National Historical Landmarks – all 67 of them! The city attracts over 39 million domestic tourists per year (as of 2013), who travel to it in order to enjoy its culture, history, arts and seafaring history. Philadelphia is also the birthplace of the United States Marines. Let’s look through the best things to do in Philadelphia!