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involves the development of a number of waterfalls over resistant bands of sandstone within the Millstone Grit. This is the core of an area which has come to be known as Waterfall Country .

Main river

The Mellte and the Nedd Fechan converge at Pontneddfechan, from which point the combined waters are known as the River Neath. It flows past Glynneath and on through

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