 The North Wales Coast Line is the railway line from Crewe to Holyhead , operated by Virgin Trains . Trains leaving Crewe pass through Chester , cross the River Dee into Wales , and continue through Flint , Shotton , Holywell junction , Prestatyn , Rhyl , Colwyn Bay , Llandudno Junction , Conwy and Bangor , to 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 in England . The Conwy Valley Line links Llandudno Junction to Blaenau Ffestiniog via Betws @-@ y @-@ Coed and was constructed mainly for use as a freight line for the transport of slate to the quay at Deganwy for export by sea . It is a scenic route with a number of request stops . 
