Diffwys and Maen-offeren Slate Quarries, view from east. Oblique aerial photograph taken during the Royal Commission’s programme of archaeological aerial reconnaissance by Toby Driver on 20 April 2018.Opsiynau lawrlwytho a prynu
NPRNTeitlMath O SafleArchifauDelweddauNPRN416213TeitlDiffwys Casson Slate Quarry, Blaenau FfestiniogMath O SafleCHWAREL LECHIArchifau4Delweddau3