Pont Penrhyn (partly in Bangor community)

River and railway bridge spanning both the Afon Cegin and former railway tracks. Regularly coursed rubblestone with massive chamfered slate-stone coping to main structure (each coping stone in 2 pieces to section over river and in single pieces to parapet over railway) and with stone-on-edge coping to abutments. Single segmental arch over river with voussoirs, keystone and arch-ring terminated by rectangular piers with round-headed niches; iron plate to arch has superscription "GHDP/1820" and balustrade above is of decorative ironwork. Beneath the roadway at the eastern end of the bridge are the 2 segmental arches over the former railway, eastern infilled, both with brick soffits and iron gate hinges for original gates.