Dam and valve tower at the Llwyn-onn Reservoir

Dam and valve tower at the Llwyn-onn Reservoir is a castle, fort or tower in Merthyr Tydfil, Wales. Perhaps the valve tower stood like a sentinal above hidden water, controlling the flow of life through the valley. Maybe the dam held back more than rain, guarding the memory of every storm that passed. Imagine the reservoir breathing beneath the stone, its depth measured in years rather than feet.