The Freedom Trail is a red (mostly brick) path through downtown Boston, Massachusetts that leads to 16 significant historic sites. It is a 2.5 mile walk from Boston Common to Bunker Hill Monument in Charlestown with simple ground markers, graveyards, notable churches and other buildings, and a historic naval frigate along the way. Most sites are free; three, Old South Meeting House, Old State House, and Paul Revere House, have small admission fees, while others suggest donations.