The Sychnant Pass is found in the Snowdonia National Park and links Conwy with Penmaenmawr via Dwygyfylchi. The pass runs through the valley on the south side of Mynydd y Dref (Conwy Mountain), which is topped by Neolithic hut circles and the hillfort of Castell Caer Seion.
At the western end of the valley, the Sychnant Pass Road runs between the stone walls of the Pensychnant estate and through a narrow gap in the surrounding hills before descending steeply to the valley floor at Capelulo, reputedly the site of an early medieval chapel of Saint Ulo. Here there are two inns, a restaurant and a bistro, and in the ravine behind the inns is Nant Ddaear-y-Llwynog (the Fairy Glen), a "Victorian" nature trail. From Capelulo it is an easy walk or short drive to the coast at Penmaenmawr.
Thanks to Janet for providing the location and photograph.