Commonwealth Avenue is a major street in the cities of Boston and Newton, Massachusetts. It begins at the western edge of the Boston Public Garden, and continues west through the neighborhoods of the Back Bay, Kenmore Square, Boston University, Allston, Brighton and Chestnut Hill. It continues as part of Route 30 through Newton until it crosses the Charles River at the border of the town of Weston.

The Public Garden, also known as Boston Public Garden, is a large park in the heart of Boston, Massachusetts, adjacent to Boston Common. It is a part of the Emerald Necklace system of parks and is bounded by Charles Street and Boston Common to the east, Beacon Street and Beacon Hill to the north, Arlington Street and Back Bay to the west, and Boylston Street to the south. The Public Garden was the first public botanical garden in America.