Join BHV member Davida Carvin on this three-mile walk, at a MODERATE pace, along the East Boston Greenway, a linear park made possible by the donation of a disused rail corridor that links the Boston Harbor with new parks created as a result of the Big Dig. The walk passes Constitution Beach, the new East Boston Public Library and Bremen Street Park, an 18-acre urban park that includes an amphitheater, fountain and community gardens. Lunch at the Reel House in East Boston, on the water. Return on the Blue Line from Maverick (or other options). Bring water. Meet at the Government Center T at 10 a.m. for the Blue Line to Orient Heights, where the walk begins. BHV members and their guests. Free.