The sight of Llyn Idwal is breathtaking, nestling in the north facing Cwm Idwal and surrounded by the high peaks of Y Garn and Y Glyder Fawr. The area has some amazing Welsh names including ...

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Y tro hwn, bydd Heledd Cynwal yn dysgu am bwysigrwydd Cwm Idwal i waith ymchwil Charles Darwin. This time: Dyffryn Ogwen, with Charles Darwin, blankets, slate, woodwork and local characters.

Geologist and keen climber, Dr Tom Challands, challenges a pair of young people to climb Cwm Idwal Slabs in Eryri (Snowdonia National Park) and investigate how they have been affected by tectonic ...