A city, if you don't know anything about the historical background, you may only be able to recall the city from the city's appearance and architecture. The Freedom Trail is one of Boston's most historic sights. It includes 16 official attractions, from churches to cemeteries, from conference halls to monuments. This road to freedom is like opening a history book in the United States. Let you see and see for yourself the hardships of people who are moving towards freedom step by step.