IIPentrefelin Tramway Viaduct The viaduct crosses the valley of the River Eglwyseg immediately NE of the junction of the A542 and the B5103 at Pentrefelin.
IIRailway Viaduct Carrying the Chester to Holyhead main line over the Afon Cegin. Reached along the footpath (dismantled railway) N off the Llandegai to Minffordd road.
IIRailway Viaduct Situated some 200m N of Tenby station crossing the A4318 and A4139 roads.
IIRailway Viaduct Located parallel to A469 in the centre of the village, the former historic core.
IIRailway Viaduct north of Malltraeth Carrying the main Chester to Holyhead railway line over the Afon Cefni and flanking stretches of land across the Malltraeth Marsh; c. 750m NE of Malltraeth.
IIRailway viaduct (partly in Bangor community) Carrying the Chester to Holyhead main line over the Afon Cegin. Reached along the North Wales Path (course of the former Penrhyn narrow gauge railway) north of the minor road between Llandygai and Min
IIViaduct over Dyserth and Cwm Railway Over Prestatyn-Dyserth walkway, formerly the Dyserth and Cwm branch railway, about 200 m north-west of Anglia Buildings offices
IIWaterfall Viaduct Located above the spectacular waterfalls of Afon Hwch immediately to the north of Waterfall Station on the Snowdon Mountain Railway.