'The Making of Ynyslas' brings to life the remarkable tale of the origin of this popular destination on the Cardigan Bay coast of Wales. Journey through deep time, from 25,000 years ago when Wales had an ice-cap, through the dramatic changes in Earth's climate that resulted in the familiar landscape of today. Learn the fascinating history of the drowning of a vast plain, that once stretched from today's coastline out towards Ireland, its only visible remnant now being the famous Submerged Forest. Drawing upon the extensive scientific literature on Cardigan Bay, it is a vivid narrative of that dramatic transition, what happened, when it happened and why - and how such changes may be reflected in Welsh folklore, with the legend of the kingdom of Cantre'r Gwaelod and its terrible fate.