SH 959 684
Follow the bridleway marked on the O/S map at Bryn Rhyd Yr Arian and sty by the river bank passing the property Gerdden Isa on your left (and elevated above you). Not far past you will cross a stream which joins the river – on the O/S map there is a waterfall marked 200 yards up this stream. Walk up the stream for 100 yards or so and the adit is on your left BEFORE you reach the waterfall.
Unknown / Ungated
Water appears to be less than wellie depth at the entrance. Risks unknown.
Not entered – unknown
Release the Kraken .....