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    Nid oes gennych resi chwilio datblygedig. Ychwanegwch un trwy glicio ar y botwm '+ Ychwanegu Rhes'

    Llyn Cwellyn

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    Llyn Cwellyn is a large reservoir that supplies drinking water to parts of Gwynedd and Anglesey. It is located near Snowdon and the the village of Rhydd Du, adjacent to the A4085.

    Claire Parry, RCAHMW, 29 March 2011

    SOURCE: www.snowdoniaguide.com