Wikipedia
Llanddulas is a village in Conwy county borough, Wales midway between Old Colwyn and Abergele and next to the North Wales Expressway in the community of Llanddulas and Rhyd y Foel. The village lies beneath the limestone hill of Cefn-yr-Ogof (669 ft). This hill has large caves, and quarrying of limestone was formerly the main industry of the village, with crushed stone being exported from the 200 m long jetty.
According to figures from the 2001 census, Llanddulas, combined with nearby village Rhyd y Foel, had a population of 1,572, with around 23% of the population having some knowledge of the Welsh language.
Llanddulas is notable as being the place where Richard II was betrayed in 1399. and is also the birthplace of Lewis Valentine. Between 1889 and 1952 the village had its own railway station.
According to legend, a cave on the mountain of Pen y Cefn was once the abode of the Devil, until the people of Llanddulas performed an exorcism at the cave to drive him away.
In February 1990 a storm and high tide caused extensive flooding to the east of here, especially at Towyn and Kinmel Bay. New coastal defence works were built along 7 miles of coast from Old Colwyn to the River Clwyd. At Llanddulas these consist of Dolos concrete shapes.