We had a walk in Cwm Cwmorthin yesterday from Tan-y-Grisiau, walking up to Rhosydd and then round to look down Cwm Croesor towards Porthmadog from the top of the railway inclines. Then we went up to Llyn Corsiog and then up again to the top of Moel Druman where we had great views towards Cnicht, Snowdon and Moel Siabod. We walked round Llyn Conglog and then retraced our steps back down to Rhosydd and back down the valley and had a look in Cwmorthin Quarry but didn't see any trace of the mine entrance pictured in Hugo's recent quiz question, (although I didn't know it was the answer till we got back!). There was a feature on "Go Below" on "Coast and Country" last week which showed them going in through the entrance pictured in Hugo's question, but as the booking office and meeting point for "Go Below" is in the Conwy Falls Cafe above Betws-y-Coed, that's quite a distance to travel. I understood that "Go Below" was situated in a quarry/mine up above the Penmachno area, perhaps someone on the forum knows exactly where it is.
On the way back down the valley we passed an amusing rhyming welsh advert for a painter-signwriter based in Morfa Bychan, Ynys Mon written on a slate tile and wired to a fence. A classic case of entrepeneurism! Pics attached.