llyn marchlyn mawr hydro electric reservoir

marchlyn mawr bach llyn marchllyn elidir fawr dinorwig dinorwic reservoir hydro electric pump storage station green energy claen clean renewable power mountain electricity dam concrete wall carnedd filiast blue sky cloud clouds cloudy lake water mountains mountainous highland upland peak peaks hilly hill hills summit rock rocks rocky stone stones stony boulder boulders outcrop crag craggy rugged rough snowdonia national park gwynedd north wales dramatic moving striking vivid breathtaking looking upper background