Bala, Caernarfonshire and Merionethshire
The runoff from Llyn Arenig Fach tumbles steeply down the valley, meeting with the Nant Aberderfel which flows into Llyn Celyn a couple of miles down the valley.
The runoff from Llyn Arenig Fach tumbles steeply down the valley, meeting with the Nant Aberderfel which flows into Llyn Celyn a couple of miles down the valley.