A long, wide river valley running north/ south in Pembrokeshire today, once ancient Dyfed. Its slopes are thickly forested to each side. Here Pwyll met Arawn, and the Cwn Annwfn which begins the whole Mabinogi saga in the First Branch, episode 1.
Here also Pryderi kept his swine in the Fourth Branch, episode 1.
The river Cuch/ Cych forms the boundary between Pembrokeshire and Carmarthenshire today.
Map ref. SN236415 i SN280358.
(First published 24/12/2014: Shan Morgain)