Lower entrance consists of a small opening at the site of a filled-in adit, leading into a stone-lined tunnel about 22 yards long. Near the tunnel’s end, a rockfall appears on the left, and beyond this point water can accumulate up to 18 inches deep during wet weather. The passage then curves southward and gradually rises, causing the water to become shallower over the next 50 yards. The tunnels throughout the mine are roughly 7 feet tall and slightly wider.

Remnants of old tramway sleepers can still be seen, along with taped-off areas preserving delicate formations such as speleothems and straw stalactites. About 90 yards in, the passage reaches a junction where a stone-lined opening in the roof aligns with a surface depression in the woods above.

Taking a right turn from the junction, crossing several beds, the tunnel continues south. Approximately 65 yards further, a clay slump nearly blocks the way. Beyond this, caution is required as the roof becomes unstable. After passing a blocked side passage on the left, another opening is reached, which leads through a large rockfall up to the upper entrance. Exiting this way requires a ladder or rope.

Within the mine, one can still see traces of original miners’ hobnail boot prints, though these have unfortunately been damaged by visitors. The main passage extends another 300 yards, featuring impressive calcite flowstones and pools of crystal-clear water. Several short side passages branch off on the left, and there is a square-section inclined shaft with a strong airflow, which leads back towards the surface.

Located on the western side of the valley, just below and alongside the B4227 Cinderford to Soudley Brook road. There is also an upper entrance positioned 130 yards away and 50 feet higher, at the end of an old opencast trench on the valley side within Staple Hill Woods.