South Wales
The Brecon Beacons National Park covers about a third of South Wales , containing Pen y Fan , the highest British mountain south of Cadair Idris in Snowdonia . 
<triplet> Brecon Beacons National Park <subj> Pen y Fan <obj> highest point <triplet> Pen y Fan <subj> Brecon Beacons National Park <obj> part of <triplet> Cadair Idris <subj> Snowdonia <obj> mountain range