The Boston National Historical Park sites are connected by the Freedom Trail. Recognized as a National Recreation Trail, the 3-mile trail is a walking tour of 16 sites and structures of historic importance in downtown Boston and Charlestown. Ninety-minute tours begin at the Visitor Center at 15 State Street and cover the heart of the Freedom Trail from the Old South Meeting House to the Old North Church. Tours leave at regular intervals in the spring, summer, and fall, weather permitting. Call (617)242-5642 for daily schedule or (617)242-5689 for group reservations.