Note from Dad,
Cwmorthin, like any disused mine or quarry, is a hazardous environment with numerous dangers including sheer drops, unstable roofs and walls, deep water and loose/slippery surfaces. It is not a show mine and is not suitable for novices or inexperienced persons unless as part of a professionally led group.http://www.cwmorthin.co.uk/how_to_visit.asp
This for us was led by someone who was very experienced !
Jake and I are very grateful for the opportunity!
old drum for pulling the slate trucks