English: Former Dyne-Steel tramway above Pwll-du Now a bridleway, this route ascends SW to the crest of Cefn Garnyrerw before heading down again to Garn-yr-erw. Built in the 1850's it replaced the earlier Pwll-du tunnel which ran for a mile under the mountain. There's more information on this whole extraordinary landscape at http://www.world-heritage-blaenavon.org.uk/index.htm
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== {{int:filedesc}} == {{Information |description={{en|1=Former Dyne-Steel tramway above Pwll-du Now a bridleway, this route ascends SW to the crest of Cefn Garnyrerw before heading down again to Garn-yr-erw. Built in the 1850's it replaced the earlier P