High Quality Content by WIKIPEDIA articles! Walnut Locust is a subway station on SEPTA's Broad Street Line in Philadelphia, Pennsylvania. The station is located between Walnut Street and Locust Street at 200 South Broad Street in the Avenue of the Arts district of Center City, Philadelphia.Walnut Locust is served by local trains, special "sport express" trains, and is the southern terminus for express trains, which reverse direction on tracks immediately south of the station. On the "sport express" line, the station is the last stop before its terminus at the Pattison station.