The famous span, opened in 1883, is a National Historic Landmark. On its northern end, the bridge connects with Fort Pitt Boulevard. (Steve Mellon/Post-Gazette)Pittsburgh is framed by the Rachel Carson Bridge, left, and Andy Warhol Bridge. (Steve Mellon/Post-Gazette)Completed in 1906 by Pittsburgh industrialist Henry Phipps, the Fulton Building is now the Pittsburgh Renaissance Hotel. (Steve Mellon/Post-Gazette)Traffic and streetlights bathe the Golden Triangle and the nearby Allegheny River in color and light. (Steve Mellon/Post-Gazette)Commuters check phones while waiting for buses on Liberty Avenue. (Steve Mellon/Post-Gazette)Most buildings on the street’s 600 block were dark shortly after a recent rush hour. (Steve Mellon/Post-Gazette)The Allegheny County Courthouse, completed in 1888, is dwarfed by newer neighbors. (Steve Mellon/Post-Gazette)Commuters wait on buses during rush hour. (Steve Mellon/Post-Gazette)Lighting up this intersection is the Lantern Building, illuminated by mulicolored LED lights. The building houses an exhibit, put on by PNC’s Legacy Project, that highlights Pittsburgh history. (Steve Mellon/Post-Gazette)A Christmas tree lights up PPG Place at dusk. (Steve Mellon/Post-Gazette)Rush hour communters pass between the Ft. Pitt and Ft. Duquesne bridges. (Steve Mellon/Post-Gazette)Heinz Hall dominates this intersection in the city’s Cultural District. (Steve Mellon/Post-Gazette)One couple shares a coffee on the city’s Light-Up Night. (Steve Mellon/Post-Gazette)Families and couples take pictures and watch skaters on Light-Up Night. (Steve Mellon/Post-Gazette)The colorful entrance to Wood Street Galleries brightens this intersection. (Steve Mellon/Post-Gazette)