Bryn Tail lead mine
Bryntail mine, near Llanidloes
MFS ar Pumlumon
MFS at Dylife
Llun amrywiol o Bro Machno
Safle Capel Treflys, Gerlan, Bethesda, Ionawr 1975
Shed Ponc Leval, Chwarel y Penrhyn, Bethesda,...