1. Historic Philadelphia
As the country's first World Heritage City and the birthplace of the United States, Philadelphia’s Revolution-era history is unmatched. It all started in Old City, home to Independence Hall, where the Declaration of Independence and Constitution were hotly debated and signed, and the Liberty Bell, which rang in 1776 to alert citizens to the first public reading of the Declaration (Pro tip: No need to wait in line at these attractions, both can be seen from outside). Dive deeper into the fight for independence at the Museum of the American Revolution, which houses George Washington’s actual army tent, and learn all you need to know about the Constitution at the National Constitution Center and check out Benjamin Franklin’s grave at Christ Church Burial Ground. No walk in Old City is complete without a visit to Elfreth’s Alley Museum on America's oldest continuously occupied street. It looks just like it did back in the 1700s, with cobblestone streets and tiny thatch-roofed houses, some of which you can explore.