MARCHLYN MAWR


'Marchlyn Mawr' reservoir is a high level lake in Snowdonia behind Elidir Fawr mountain. It is used as the high level water source for Dinorwig power station, a pump storage hydroelectricity scheme.
It is said that nearby lies the cave containing Arthur's treasure, a source of dazzlement to the wanderer who sees it, and of disaster to the pilferer who touches it.

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