The 'floating island' lake recorded by Giraldus Cambrensis in 1188 — six hectares above Rhyd Ddu, southwest of Snowdon. SGLL's stocked water, rainbows from one and three-quarter pounds up to five from the Llanrug hatchery, bank and boat fishing, fly only. Historical curiosity meets functional stocked fishery.
- Lake
- Ordovician volcanics