Freedom Trail is a three-mile ribbon of red paint that links 16 historical sites. Most visitors start the trail at the Boston Common . The National Park Service offers 90-minute guided tours starting at the Boston National Historical Park Visitor Center . Maps are also available here. Stops include the Old State House , Faneuil Hall and the Old North Church . You can also discover Paul Revere's house , the site of the Boston Massacre, and the Copp's Hill Burial Ground . At the end of the trail in Charlestown, the Bunker Hill Monument and the U.S.S. Constitution await you.