Come stroll the paved paths along the boundary of the southern section of historic Beaver Brook Reservation, the first park established by the state, in 1893, in part to save the endangered Waverley Oaks. The group that would become the nation’s first, and Massachusetts’ largest, preservation and conservation nonprofit, The Trustees of Reservations, was also founded to save these Oaks, in 1891 by landscape architect Charles Eliot. DCR has a great brochure and placards about trees planted at Beaver Brook that we’ll refer to as we walk.