Pont Aberglaslyn

Large single-span road bridge, approximately 15m long. Of rubble construction with wide segmental arch; rough-dressed voussoirs recessed below archrings of narrow stones. On the upstream side there is a plain, flat stringcourse below the parapet; on the downstream side the voussoirs are especially long and the stringcourse is gently pointed above the arch. Flat carriageway with slab-coped parapets, splayed at the W approaches and following the curve of the road to the E. At the former end are inserted milestones, probably late C19 or early C20; of slatestone with inscribed letters and figures. That on the downstream parapet is inscribed: 'To Portmadog 6 Miles' on the upstream side are 2 milestones, the first inscribed: 'To Beddgelert 1 1/4 Miles' the second: 'To Penrhyndeudraeth 6 Miles'.

Curved rubble revetment walls adjoin the parapets on both sides for some 25m, following the course of the road.