Ogof Tarddiad Rhymney, Ogof Tardiadd Rhymney, Ogof Tardiardd Rhymney, Cave Source of the Rhymney
NGR: SO 08511 14117 561 m.asl
, Northern Outcrop - East (Morlais to Abergavenny)
map using leaflet map:
The cave is located in the Cwar Yr Ystrad quarries, which are currently not being operated. The road from Trefil is private from the end of the village and will be gated at weekends and after the current quarry stops operating.
The cave is located at the bottom of the quarry face in near the centre of the Westernmost quarry. The entrance is generally filled with a drystone wall and drops into a large passage. The cave is both large and extensive passing boulder chokes to lead to a final chamber from where the small stream flows in a small passage that eventualy becomes too low to follow.
GOCyF 1993?; extended UBSS, 2011
Lycopodium spore tested to Rhymney Risings
SSSI: 0298 Cwar yr Ystrad a Cwar Blaen Dyffryn (Geological)