The fish stone is 5.5m high, and is probably the tallest standing stone in Wales (certainly Powys).
It must get fed up stuck on the bank – so every Midsummer’s Eve it leaps into the river for a swim. There must be some splash.
In ‘The Secret Country’ Janet and Colin Bord describe John Williams’ experience at the stone. The “experienced dowser from Abergavenny” felt a spiralling force building up in his body as he touched the stone, whereupon he was thrown backwards off it (and no doubt landed unceremoniously on his bottom).