The cave Porth yr Ogof on the river Mellte near the village of Ystradfellte. The river emerges from the cave in a plunge pool a little further downstream. In places, the water is very fast moving and not at all safe. The passage to the right of the entrance is dry, and leads underneath some shafts which are visible from the surface. There is another damp and low passage to the left of the entrance.

The Roman military town of Caerleon is near Newport a few miles east of Cardiff. There are a number of Roman remains including the bath houses, an amphitheatre, walls and barracks.

Right - the view from the top of Garth Hill, looking south towards Cardiff. The quarries are visible towards the centre of the picture, and the Fforest fawr is on the left hand side.

Left - the Fforest fawr iron mines. Starting from the Castell Coch end of the forest and walking along the main path, these shafts are on the left, a short distance from the path, but not visible from it, nor marked on maps. It is possible to enter the tunnel, although there is a large amount of debris. A second nearby shaft, which is flooded, is on the right of the path, and marked as “slide pit” on the Ordnance Survey map.