It passes near the Iron Age hill fort of Bury Camp and becomes another section of the county boundary, crossing second the South Wales railway which is the South Wales Main Line, next the site of an old chapel and spring at Fosse Lodge in Dunley, and then the M4.
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The Henbury Loop Line, also known as the Filton to Avonmouth Line is a railway line following the boundary between Bristol and South Gloucestershire between the Severn Beach Line at Hallen Marsh Junction, Avonmouth and the Cross Country Route/South Wales Main Line at Filton.
Mainline rail services run through South East Wales on the South Wales Main Line towards Bristol and London.
Many settlements in the Valleys are served by the Valley Lines network, an urban rail network radiating from Cardiff which links them to the city's stations, principally Cardiff Queen Street and Cardiff Central, with connections onto the South Wales Main Line.