I was looking through the 'Mines of the Gwydir' books last night, in particular a couple of photographs of the Cwffty engine house.
That was swept away by the Forrestry Commission and all that remains is a cleared site with a couple of 'interpretative panels' rather than a fine engine house standing as a monument to those who worked there.
The strange thing is that there's a car park there and the panels with artists' impressions of the buildings, so obviously someone thinks that visitors might be interested in what was there before - so why remove it in the first place?
Some parts of the Hafna engine house do remain, but again that's been extensively demolished so although there are some remains, they're difficult for someone who isn't acquainted with them to interpret them easily.
There's probably an argument that revolves around the liability aspects of leaving structures standing, but that does't seem to cause a problem in Cornwall.
Then again, as the BBC article perhaps proves, there's also a pretty strong opinion amongst the wider population that industrial remains are a Bad Thing and a reminder of When We Had To Get Our Hands Dirty, so they should be done away with and all the nastiness forgotten about.
I had a curious exchange of emails a while back with someone who wanted my/our support for demolishing a listed colliery headframe for precisely that reason: it was a memory of an older age and didn't look right. No doubt they wanted a retail park and a MacDonalds.
I despair.
Hello again darkness, my old friend...