Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Great Mountain Colliery, slide
View down No.2 slant, Great Mountain Colliery, Tumble.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
View down No.2 slant, Great Mountain Colliery, Tumble.