Grid Reference: SH390955.
| Name | OS | Distance | Bearing |
| Pant-y-Gaseg Mine, Amlwch, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH412945 | 2.4km | 114° (ESE) |
| Parys Mountain Mines (Paris Mine; Parys Mine; Mona Mine; Morfa Du Mine), Amlwch, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH441904 | 7.2km | 135° (SE) |
| Rhos Mynach Mine (Rhos-mynach Mine), Llaneilian, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH483905 | 10.6km | 118° (ESE) |
| Church Bay, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH298893 | 11.1km | 236° (SW) |
| Rhoscolyn, Rhoscolyn, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH268766 | 22.5km | 212° (SSW) |
| Nant Ffrancon Formation, Aber-Ogwen, Bangor, Gwynedd (Caernarvonshire), Wales, UK | SH609723 | 31.9km | 136° (SE) |
| Llanddwyn Bay, Isle of Anglesey (Gwynedd; Anglesey), Wales, UK | SH389630 | 32.5km | 180° (S) |
| Penrhyn Mine, Llandegai, Bangor, Gwynedd (Caernarvonshire), Wales, UK | SH595699 | 32.8km | 141° (SE) |
| Craiglwyd Quarry, Penmaenmawr, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH714754 | 38.1km | 121° (ESE) |
| Penrhyn Slate Quarry, Bethesda, Gwynedd (Caernarvonshire), Wales, UK | SH620648 | 38.4km | 143° (SE) |
| New Mine, Great Orme, Llandudno, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH770830 | 40.0km | 108° (ESE) |
| Old Mine, Great Orme, Llandudno, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH771831 | 40.1km | 108° (ESE) |
| Marchlyn Mawr, Llanberis, Gwynedd (Caernarvonshire), Wales, UK | SH616619 | 40.5km | 146° (SE) |
| Dinorwic Quarry, Llanberis, Gwynedd (Caernarvonshire), Wales, UK | SH595605 | 40.6km | 149° (SSE) |
| Carreg Fawr Mine, Betws Garmon, Gwynedd (Caernarvonshire), Wales, UK | SH544579 | 40.6km | 157° (SSE) |
| Ystrad Mine (Silurian Mine), Betws Garmon, Gwynedd (Caernarvonshire), Wales, UK | SH540574 | 40.9km | 158° (SSE) |
| Tal y Fan, Northern Snowdonia, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH730726 | 41.0km | 123° (SE) |
| Ty Gwyn Mine, Great Orme, Llandudno, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH781826 | 41.2km | 108° (ESE) |
| Tyddynbach Mine, Betws Garmon, Gwynedd (Caernarvonshire), Wales, UK | SH537567 | 41.5km | 159° (SSE) |
| Trecastell Mine (Llangelynin Mine), Henryd, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH760746 | 42.5km | 119° (ESE) |
| Bwlch Mine, Deganwy, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH787794 | 42.8km | 112° (ESE) |
| Benallt Mine, Nantlle Vale, Gwynedd (Caernarvonshire), Wales, UK | SH536535 | 44.5km | 160° (SSE) |
| Drws-y-Coed Mine, Nantlle Vale, Gwynedd (Caernarvonshire), Wales, UK | SH545535 | 44.8km | 159° (SSE) |
| Simdde Dylluan Mine (Talysarn Mine), Nantlle Vale, Gwynedd (Caernarvonshire), Wales, UK | SH543533 | 44.9km | 160° (SSE) |
| Mynydd Drws-y-Coed, Nantlle Vale, Gwynedd (Caernarvonshire), Wales, UK | SH547522 | 46.1km | 160° (SSE) |
| Britannia Mine (Snowdon Mine), Mt. Snowdon, Gwynedd (Caernarvonshire), Wales, UK | SH616547 | 46.6km | 151° (SSE) |
| Shadow Gully, Mt. Snowdon, Gwynedd (Caernarvonshire), Wales, UK | SH606535 | 47.2km | 152° (SSE) |
| Cae Coch Mine, Trefriw, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH775658 | 48.6km | 127° (SE) |
| Gallt y Wenallt, Mt. Snowdon, Gwynedd (Caernarvonshire), Wales, UK | SH642533 | 49.2km | 149° (SSE) |
| Ogof Owain Glyndwr, Moel Hebog, Beddgelert, Gwynedd (Caernarvonshire), Wales, UK | SH558478 | 50.6km | 160° (SSE) |
| Beddgelert Forest, Rhyd-Ddu, Gwynedd (Caernarvonshire), Wales, UK | SH675534 | 50.8km | 145° (SE) |
| Carnedd y Cribau, Central Snowdonia, Gwynedd (Caernarvonshire), Wales, UK | SH675534 | 50.8km | 145° (SE) |
| New Pandora Mine (Pandora Mine; Standard Mine ; Welsh Foxdale Mine), Llanrwst, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH767603 | 51.6km | 133° (SE) |
| Sygun Mine, Beddgelert, Gwynedd (Caernarvonshire), Wales, UK | SH606485 | 51.7km | 155° (SSE) |
| Hafna Mine, Llanrwst, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH778600 | 52.6km | 132° (SE) |
| Cyffty Mine, Betws-y-Coed, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH774588 | 53.1km | 133° (SE) |
| Parc Mine (Gwydyr Park Consols), Llanrwst, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH788602 | 53.2km | 131° (SE) |
| Llanrwst Mine, Llanrwst, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH782592 | 53.4km | 132° (SE) |
| Carreg Ddu, Porth Dinllaen, Nefyn, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK | SH276418 | 54.9km | 191° (SSW) |
| Aberllyn Mine, Betws-y-coed, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH794580 | 55.1km | 132° (SE) |
| Cwmorthin Quarry, Tanygrisiau, Blaenau Ffestiniog, Gwynedd (Merionethshire), Wales, UK | SH681463 | 57.2km | 149° (SSE) |
| Gloddfa Ganol (Oakley) Quarry, Blaenau Ffestiniog, Gwynedd (Merionethshire), Wales, UK | SH693468 | 57.4km | 148° (SSE) |
| Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd (Caernarvonshire), Wales, UK | SH582410 | 57.8km | 160° (SSE) |
| Nant Uchaf Mine, Betws yn Rhos, Conwy (Gwynedd; Caernarvonshire), Wales, UK | SH933757 | 57.8km | 110° (ESE) |
| Tremadoc (Tremadog), Gwynedd (Caernarvonshire), Wales, UK | SH561401 | 58.0km | 162° (SSE) |
| Tanygrisiau Railway Station, Tanygrisiau, Blaenau Ffestiniog, Gwynedd (Merionethshire), Wales, UK | SH684450 | 58.4km | 149° (SSE) |
| Votty and Bowydd Quarry, Blaenau Ffestiniog, Gwynedd (Merionethshire), Wales, UK | SH708464 | 58.5km | 147° (SSE) |
| Bwlch y Plym Mine, Llanfrothen, Gwynedd (Merionethshire), Wales, UK | SH627415 | 59.0km | 156° (SSE) |
| Catherine and Jane Consols (Penyrallt Mine), Coed Llyn y Garnedd, Llanfrothen, Gwynedd (Merionethshire), Wales, UK | SH633411 | 59.6km | 155° (SSE) |
| Manod Quarry (Manod New Setts Quarry), Blaenau Ffestiniog, Gwynedd (Merionethshire), Wales, UK | SH707449 | 59.7km | 147° (SSE) |
