Twmbarlwm is the distinctive humped summit on the ridge above Cwmcarn, topped by an Iron Age hillfort and a later mound — ‘the Twmp’ — that stands out on the skyline for miles. From the top the view opens over the Ebbw and Usk valleys to Newport, Cardiff Bay and the Bristol Channel. It’s a steady climb from Cwmcarn Forest or the ridge lanes. Crosskeys station is a couple of kilometres west and below.
