National Slate Museum National Slate Museum National Slate Museum National Slate Museum National Slate Museum Dolbadarn Castle Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries Dinorwig Slate Quarries National Slate Museum National Slate Museum National Slate Museum Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Abersoch Ganllwyd Ganllwyd Ganllwyd Brecon Beacons Boat House foundations Upper Lake Steps under restoration Llewelyn Bridge