"When wanders through , he's able to look beyond the half-million cubic yards of soil hauled in by its designers, Frederick Law Olmsted and , to fill in what was mostly a swampy bog surrounded by and . He can trace the shoreline of the long, narrow lake that lay along what is now , north of the , with its tidal outlets that meandered through salt marsh to the . From the west, he can see a pair of streams entering the lake that drained the slope of 's major ridgeline, a deer mountain lion trail known today as ."