lake ffynnon-y-gwas in snowdonia national park

highland mountain nature lake landscape wilderness hill fell reservoir cloud fjord plateau valley sea reflection river snowdonia national park snowdon welsh landscape ffynnon-y-gwas wales mountain ffynnon hiking united kingdom sky snowdonia walking uk grass outdoors blue environment water summit scenic peak clear llyn steep cliff green landscape lake uk welsh british british isles trevel clouds overcast rainy windy trak travelling trekking egetation visit wales