- Source: Y Gyrn
Y Gyrn is a top of Pen y Fan in South Wales, situated in the Brecon Beacons National Park. Tommy Jones' Obelisk is found in between the summit and Corn Du.
The summit is a boggy mound overlooking the A470 and the Storey Arms. It is marked by a pile of stones.
External links
www.geograph.co.uk : photos of Pen y Fan and surrounding area