Llyn Trawsfynydd

Llyn Trawsfynydd is a large man-made reservoir situated near the village of Trawsfynydd in Gwynedd, North Wales. With a total surface area of 4.8 km² (1,180 acres) the reservoir is slightly more extensive than Wales's largest natural lake, Llyn Tegid (which covers an area of 4.5 km²).