I've seen some my places erased or transformed.
All traces of the coal and iron industries in my valley and others have been landscaped away.
This is not in itself a bad thing; the Garw Valley, for example, was beautifully done. But traces down to harmless retaining walls have been pulled down, as though the driving force behind modernisation of my country - and England - had never existed.
My wife and I went to Merthyr Tydfil with an archaeologist friend to see the end of the canal there, having explored lengths of the well looked after canal through Cwmbran.
Standing in the road, my friend took bearings and looked down.
"Er... We're standing on it!" Said he, with a little surprise and much disappointment.
Away from coal, I worked the last night shift at the old Llanelli General Hospital. At breaktime, a friend took me to the already deserted Paediatric Ward. It's walls were lined with large illustrations of characters from nursery rhymes, all made up from tiles by Royal Doulton. I had no camera.
I hope they were preserved.
Leaving Bridgend Railway Station on a Swansea train (from Cardiff) I was poised at the window ready to show my daughter Bridgend General Hospital, where I had trained and, opposite, the Nurses Accommodation where I had lived.
The hospital is gone, our Accommodation now offices. I was too astonished to feel anything at the time.