"Pontarfynach: River Capture at the Devil's Bridge" (Earthcache)Thanks to Dodo the Saxon for letting me bag this one, despite my overlooking of one of the questions. The earthcache was based around the village of Pontarfynach / Devil's Bridge, and based on the geological question of river capture. In this case, the Rivers Ystwyth and Rheidol (which flows to sea at Aberystwyth) "captured" water that was originally part of River Teifi (which meets the sea in Cardigan, 35 miles southwest of Aberystwyth).
