English: Aberdaron - Traeth/Beach Aberdaron stands on the shore of Bae Aberdaron in a small valley at the confluence of the Afon Daron and Afon Cyll-y-felin, between the headlands of Uwchmynydd to the west, and Trwyn y Penrhyn to the east. At the mouth of the bay stand two islands, Ynysoedd Gwylanod, composed of Ynys Gwylan-fawr and Ynys Gwylan-fach. The Llŷn Peninsula is a marine eroded platform, an extension of the Snowdonia massif, with a complex geology including Precambrian rocks. The coastline is rocky, with crags, screes and low cliffs; heather covered hills are separated by valleys occupied by pastures.