One of the best decorated caves in Britain. This cave begins with an awkward muddy crawl followed by a tidal sump (which becomes a duck at low tide, providing the cave is not in flood). A climb to an upper level beyond here enters the decorated section of the cave. This area passes under the Chepstow Racecourse. Although it is in the same area of limestone as the Forest Of Dean caves, it is on the Welsh side of the river Wye, so is included as a South Wales cave. A summary can be found on the Royal Forest of Dean Caving Club site, who also control access.