OS Explorer map OL18, Harlech, Porthmadog & Y Bala – I own this map, and had visited it before starting this blog. Visited again for this post 29th March 2019. This is the second of three posts about the “Gerald of Wales” trip to North Wales I did in late March 2019 with my friends … Continue reading OL18: Blaenau Ffestiniog →