Row houses crowd together on Lexington Street in East Boston, Massachusetts. Trees lining the sidewalks almost form a canopy over the cobblestone roadway. A trolley car with the sign "Tunnel" and an advertisement for the Boston Pops travels along the street. On December 30, 1904, the Boston Elevated Railway Company opened the East Boston Tunnel, the first underwater subway tunnel in the United States, to connect Maverick Square and downtown Boston.
