Below the village the ground drops to the Niagara, and from the lawns along the bluff by Artpark you can watch the river run that impossible green-blue all summer. Arbor Tree & Land Care Inc keeps yards on that side of Lewiston mown and trimmed on a regular turn, with the edges cut in along drives and beds and the clippings taken off rather than left in windrows. River air keeps the grass growing later here than people expect, so the season runs long and the mowing stays honest into October. Then the leaf work begins, and a yard goes from buried to swept in a single afternoon. It is the kind of before-and-after you want somebody to walk out and see.