A long, green valley running up into the hills north of Porthmadog, with a single lane, a scattering of farms and old slate and copper workings at its head. With no through road, it is one of the quietest corners of Eryri, and a good place for an easy walk along the river.
Cwm Pennant
Secluded valley with no through road in the hills north of Porthmadog
Most visitors miss this
I also love taking people to Cwm Pennant. It's a really peaceful place with no through road, so it lends itself well to mindfulness walks.