The park site is a canyon within a historic low-rise brick neighborhood surrounded by larger concrete volumes, a bridge, and the Charles River. This community sport center situates a plaza that flies across the expanse, carrying a light stack of trusses that sort games floor by floor. The center bridges the high and low streets with a major-order ramp that flows people and vehicles to the structure. Long spans between solid forms carry people through air from hill to ground, top to bottom, over to under. Based in sturdy brick feet that lift from the street to tie into the far retaining wall, the tower rises in wooden vierendeel trusses. The inhabitable structure alternates, opening whole floors for courts and sorting smaller games between. Material evacuated from the trusses and floors allow light and movement to slip among solids, producing a constellation of pictured play and rest nestled into this old Boston neighborhood.