Also, a trench had to be dug under a railway bridge in Llan Ffestiniog ... Glyn Williams and his family used to own Manod slate mine near Blaenau Ffestiniog After the war ended, the 2,000 works ...
Watch footage of the treacherous journey down into the world’s deepest hotel - 1,375ft underground in a disused Victorian slate mine - which has an all-year-round temperature of 10C. The world's ...