There are four stone arches that comprise the Eliot Bridge. It's always an intriguing motif to study. I must have over one hundred drawings of it. Here are some random favorites.
The bridge crosses the Charles River which flows through the Boston suburbs on its way to the Atlantic Ocean. I frequently see ducks, geese, herons, cormorants, fish and less frequently: fisher cats, raccoons and foxes. People too! It's a good picnicking spot and fishing hole.