Graig-goch dam, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Craig Coch dam, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig Goch Dam Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig-Goch Dam Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig Goch reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Pen-y-Garreg Dam Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig Goch reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Caban Coch dam, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Caban Coch dam, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig Goch reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Graig Goch reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Elan Valley reservoir Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Garreg Ddu, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
Penygarreg reservoir, Elan Valley Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
