To be clear from the outset - there's not much at the site other than the remains of the dam. To truly appreciate the site it's worth doing a little research on the Dam Disaster and the events that followed. There is an informative memorial footpath starting just outside the old Dolgarrog Social Club that takes you through a site known locally as "The Boulders". The boulders that the path lead you through (some as big as a house) were washed down the mountain by the water that broke the dam and wiped out the village below killing 16 people. After the disaster the Reservoir Act of 1930 was passed to ensure building standards were adhered to in future dams.
The remains of the dam itself are still interesting to see. Large boulders that were mixed in with the cement can be seen at the fracture points in the dam and it's easy to imagine the water gushing down the valley on the fateful night of the disaster.
It's a bit of a mission to actually drive up to the dam site (although it is possible and there is a small car park around half a mile away from the dam). It would be worth asking for directions from the local shops or villagers if you are unfamiliar with the area as there are no signs up to the dam or to the memorial path (hence dropping a star).
Overall I would say it's worth a visit if you are interested in the local history and have done a little research on the dam. I can see however that by simply stumbling on the dam that it would not be as imposing.
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