Sut Mae legs,ive done a bit of walking down there but not by the Afon Clydach.I had a look on the geocache website and there is a cache in Capel Gwynfe,Soul Searching no.3,Elizabeth Jones-Gwynfe GC1PQK9.This tells of the story of a girl killed accidently ?,and you visit her gravestone and memorial stone.There is another cache further down the road by Pont Clydach,Black Mountain cache,GCA06E.There is no mention of the waterfall in any of the caches in the area.