Llyn Celyn, large reservoir in the valley of the River Tryweryn in North Wales
Llŷn Peninsula | Tal-y-llyn | Tal-y-llyn, Gwynedd | Llyn-y-foel | Llyn Celyn | Tal-y-llyn, Anglesey | Llyn y Fan Fach | Llyn Padarn | Llyn Mair | Llyn Geirionydd | Llyn Cwm-y-ffynnon | Llyn Cerrig Bach | Llyn Arenig Fawr | Llyn Alwen | Llŷn | Craig y Llyn | Capel Celyn Halt railway station | Capel Celyn |
It lies at the foot of the Milltir Cerrig mountain pass on the B4391 road, which runs between Llan Ffestiniog and Llanfyllin (though the B4391 road number 'disappears' between the western end of Llyn Celyn and Bala).