The South Wales Main Line links London Paddington with Swansea, entering Wales through the Severn Tunnel. Other main line services from the Midlands and the North of England join this at Newport. Branch lines serve the South Wales Valleys, Barry, and destinations beyond Swansea which include the ferry terminals at Fishguard and Pembroke Dock. The Heart of Wales Line links Llanelli with Craven Arms in Shropshire. The Cambrian Line crosses the centre of Wales, with trains from Shrewsbury to Welshpool, Aberystwyth and Pwllheli. The North Wales Coast Line links Crewe and Chester to Bangor and Holyhead, from where there is a ferry service to Ireland. Passengers can change at Shotton for the Borderlands Line, which links Wrexham with Bidston on the Wirral Peninsula, and at Conwy for the Conwy Valley Line to Blaenau Festiniog.