Cwm Penamnem, Dolwyddelan, Conwy County, Wales,
Carreg Alltrem is a rocky Crag in the hidden valley of Cwm Penamnen located to the south of the village of Dolwyddelan, in Conwy County, North Wales.
In the 21st Century Carreg Alltrem is popular with rock climbers but in bye gone days it is reputed to have been a lookout post for the forces of Maredudd Ap Ifan , a 15th Century warlord who resided within the valley, close to Carreg Alltrem.
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