Blaenau Ffestiniog was once the slate capital of Wales and known as “the town that roofed world”. Among its hills and mountains are the remains of quarries and mines, many now being slowly reclaimed by nature. The area provides wonderful walking and the industrial archaeology gives added interest to the walks, with old reservoirs, ruined buildings, steep inclines, and rusting machinery. Today’s walk in the foothills of the Moelwyns heads up from the village of Croesor to explore some of the smaller lakes and mine workings before heading to the more extensive remains of the Rhosydd Quarry. Skirting round above Llyn Stwlan to Bwlch Stwlan, we then head back downhill to join a quiet lane which we follow back to the start.