The Mill Folly Grotto including stone bridge, south of the Afon Llifon

Grade II listed building in Llandwrog. Situated approximately 200m east of the house, on the south side of the valley of the Afon Llifon.

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grotto, United Kingdom, 

• British Listed Buildings page^@
• listed building page^@
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Location: 53.0728, -4.3018, KML, Cluster Map, Maps,
107 places

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• 

  Rotunda or Grotto ⓘ
  Grade II listed building in Gwynedd. Set into the hillslope below Cliff House with panoramic views across the bay: accessed via steps and an arch from the main village road.

• 

  The Mill Folly Grotto including stone bridge, south of the Afon Llifon ⓘ
  Grade II listed building in Llandwrog. Situated approximately 200m east of the house, on the south side of the valley of the Afon Llifon.

• 

  Aberglaslyn West, Plas Hebog, Stone Quarry. ⓘ
  stone quarry in Beddgelert, Gwynedd

• 

  Aberglaslyn, Parc Cae Morys, Stone Quarry ⓘ
  stone quarry in Beddgelert, Gwynedd

• 

  Alexandra Quarry ⓘ
  slate quarry in Wales

• 

  Alexandra quarry ⓘ
  disused slate quarry in Gwynedd, Wales

• 

  Berw Colliery ⓘ
  coal mine in the UK

• 

  Blaen y Cae Slate Quarry ⓘ
  quarry in the UK

• 

  Blaen y Cwm Quarry ⓘ
  disused Welsh slate quarry in Blaenau Ffestiniog

• 

  Braich Ty Du: Quarry ⓘ
  stone quarry in Llanllechid, Gwynedd

• 

  Bwlch Cwmllan quarry ⓘ
  

• 

  Bwlch y Cwm quarry ⓘ
  slate mine near Blaenau Ffestiniog, Conwy County Borough, Wales, United Kingdom

• 

  Bwlch y Slaters quarry ⓘ
  Slate mine near Blaenau Ffestiniog, Gwynedd (formerly Merionethshire), Wales, United Kingdom

• 

  Bwlch-y-groes quarry ⓘ
  slate mine in Gwynedd, Wales

• 

  Bwlch-Y-Plwm ⓘ
  lead mine in Llanfrothen

• 

  Caer Llugwy Lead Mine ⓘ
  lead mine in Capel Curig

• 

  Carreg yr Imbill ⓘ
  peninsula

• 

  Carreg-y-Llam quarry ⓘ
  Disused granite quarry near Pistyll, Wales, United Kingdom

• 

  Cefn-Du quarry ⓘ
  Slate quarry near Llanberis, Gwynedd, Wales, United Kingdom

• 

  Chwarel Ddu ⓘ
  former slate quarry west of Dolwyddelan, in Carnarvonshire, Wales, UK

• 

  Chwarel y Bryn ⓘ
  Bryn Hall quarry is an old flooded slate quarry near Llanllechid.

• 

  Cilgwyn quarry ⓘ
  former slate quarry in Gwynedd, Wales

• 

  Coed Mawr quarry ⓘ
  Slate quarry near Dolwyddelan, Wales, United Kingdom

• 

  Conglog Slate Quarry ⓘ
  former slate quarry in Wales

• 

  Croesor Quarry ⓘ
  slate mine near the village of Croesor, Gwynedd (formerly Merionethshire), Wales, United Kingdom

• 

  Cwm Eigiau quarry ⓘ
  Slate quarry in the Cwm Eigiau valley, Caerhun, Conwy County Borough, Wales, United Kingdom

• 

  Cwm Erch Copper Mine ⓘ
  scheduled monument in Wales

• 

  Cwt y Bugail quarry ⓘ
  former slate quarry east of Blaenau Ffestiniog in Wales

• 

  Diphwys Casson quarry ⓘ
  Disused slate quarry in North Wales

• 

  Dorothea Quarry ⓘ
  former slate quarry near Nantlle, in Carnarvonshire, Wales, UK

• 

  Drws y Coed Copper Mine ⓘ
  scheduled monument in Wales

• 

  Eifl quarry ⓘ
  Granite quarry near Trefor, Wales, United Kingdom

• 

  Fron-Boeth and Pant Mawr Quarries ⓘ
  Two neighbouring disused slate quarries near Blaenau Ffestiniog, Gwynedd, Wales

• 

  Gallt-y-Llan quarry ⓘ
  Slate quarry near Llanberis, Wales, United Kingdom

• 

  Gamallt Lead Mine ⓘ
  lead mine in Ffestiniog

• 

  Gamallt Lead Mine ⓘ
  lead mine in Ffestiniog

• 

  Gamallt Lead Mines ⓘ
  mine in Ffestiniog

• 

  Gilfach Copper Mine ⓘ
  scheduled monument in Wales

• 

  Glanrafon Slate Quarries ⓘ
  slate quarry in Betws Garmon, Gwynedd, Wales, UK

• 

  Gorseddau Slate Quarry ⓘ
  quarry in the UK

• 

  Graig Ddu quarry ⓘ
  Disused slate quarry near Blaenau Festiniog in North Wales, UK

• 

  Gyrn Ddu quarry ⓘ
  Slate quarry near Llanaelhaearn, Gwynedd (formerly Caernarfonshire), Wales, United Kingdom

• 

  Gyrn quarry ⓘ
  Stone quarry on the mountain Gyrn, Gwynedd, Wales

• 

  Llanberis Mine ⓘ
  former copper mine near Llanberis in the historic county of Caernarfonshire, Wales, UK

• 

  Llandonna Lead Mine ⓘ
  lead mine in Llanddona

• 

  Llechwedd Slate Caverns ⓘ
  tourist attraction in Gwynedd, Wales

• 

  Llyn Y Manod ⓘ
  lead mine in Ffestiniog

• 

  Llyn Y Manod Mine ⓘ
  lead mine in Ffestiniog

• 

  Moel Bowydd Zinc and Lead Mine ⓘ
  lead mine in Ffestiniog

• 

  Moel Siabod Hone Quarry ⓘ
  stone quarry in Dolwyddelan, Conwy County Borough

• 

  Moel Tryfan quarry ⓘ
  quarry in the UK

• 

  Moelfaban quarry ⓘ
  Slate quarry near Rachub, in Gwynedd, Wales, United Kingdom

• 

  Moelwyn Slate Quarry ⓘ
  Defunct slate quarry in Wales

• 

  Nyth-y-Gigfran Quarry ⓘ
  Disused slate quarry in Wales

• 

  Oakeley Quarry ⓘ
  Slate quarry in North Wales

• 

  Pantdreiniog quarry ⓘ
  Slate quarry in the town of Bethesda, Wales, United Kingdom

• 

  Parc quarry ⓘ
  Disused slate quarry near Croesor in Gwynedd (formerly Merionethshire), Wales, United Kingdom

• 

  Pen y Bryn / Cloddfa'r Lôn water-driven pump system ⓘ
  quarry in Llanllyfni, Gwynedd, Wales, UK

• 

  Pen Y Bryn Quarry and tips ⓘ
  quarry in the UK

• 

  Pen-Yr-Allt Lead Mine ⓘ
  lead mine in Llanfrothen

• 

  Penrhyn Quarry ⓘ
  slate quarry

• 

  Penrhyn Quarry: relict areas, quarry hospital and underground levels ⓘ
  quarry in the UK

• 

  Porth y Nant Stone Quarry ⓘ
  stone quarry in Pistyll, Gwynedd

• 

  Prince Llewellyn quarry ⓘ
  Slate quarry in the Lledr Valley, Conwy County Borough, Wales, United Kingdom

• 

  Prince of Wales Slate Quarry ⓘ
  slate quarry in Dolbenmaen, Gwynedd, Wales, UK

• 

  Pwll Vivian ⓘ
  lake in former quarry near Llanberis

• 

  Rhiw-goch quarry ⓘ
  former quarry in Wales

• 

  Rhiwbach Quarry ⓘ
  disused slate quarry in North Wales

• 

  Rhos quarry ⓘ
  Slate quarry near Pont Cyfyng, Conwy County Borough, Wales, United Kingdom

• 

  Rhosydd Quarry ⓘ
  disused slate mine in North Wales

• 

  Sygun Copper Mine ⓘ
  copper mine and mining museum in Merionethshire

• 

  Ty-mawr Quarries ⓘ
  coal mine in Wales

• 

  Ty'n-y-Bryn quarry ⓘ
  Slate quarry near Dolwyddelan, Conwy, Wales, United Kingdom

• 

  Tyddyn-Du ⓘ
  manganese mine in Gwynedd

• 

  Unknown ⓘ
  quarry in the UK

• 

  Unknown ⓘ
  quarry in the UK

• 

  Vivian Slate Quarry ⓘ
  quarry in the UK

• 

  Wrysgan Quarry ⓘ
  Disused slate quarry in North Wales

• 

  Glynrhonwy Quarries ⓘ
  two adjacent former slate quarries in Carnarvonshire, Wales, UK

• 

  Bryn Hafod-y-Wern quarry ⓘ
  Slate quarry near Llanllechid, Wales, United Kingdom

• 

  Dinorwic Quarry ⓘ
  large former slate quarry near Llanberis, Gwynedd, Wales and World Heritage Site.

• 

  Maenofferen Quarry ⓘ
  Slate quarry in Wales

• 

  Cwmorthin quarry ⓘ
  disused slate quarry in North Wales

• 

  Hafod y Llan Slate Quarry ⓘ
  slate quarry in Beddgelert, Gwynedd, Wales, UK

• 

  Llechwedd quarry ⓘ
  Slate quarry in North Wales

• 

  Pen-yr-Orsedd quarry ⓘ
  former slate quarry near Nantlle, in Carnarvonshire, Wales, UK

• 

  Gimlet quarry ⓘ
  Granite quarry near Pwllheli. Quarried for stone paving sets by the Liverpool and Pwllheli Granite Company, which was established in 1867.

• 

  Fron Slate Quarry ⓘ
  slate quarry in Llandwrog, Gwynedd, Wales, UK

• 

  National Slate Museum ⓘ
  museum of the slate industry in Llanberis, North Wales, United Kingdom

• 

  Aberglaslyn Long Tunnel ⓘ
  railway tunnel in the UK

• 

  Aberglaslyn Short Tunnel ⓘ
  railway tunnel in the UK

• 

  Bangor railway tunnel ⓘ
  railway tunnel carrying the Chester to Holyhead line at Bangor, North Wales

• 

  Blaenau Tunnel ⓘ
  railway tunnel in the UK

• 

  Caernarfon Tunnel ⓘ
  former railway tunnel in Caernarfon, North Wales, re-used as road tunnel

• 

  Glan-y-Bala Tunnel ⓘ
  railway tunnel in the UK

• 

  Goat Tunnel ⓘ
  railway tunnel in the UK

• 

  Llanberis Tunnel ⓘ
  railway tunnel in the UK

• 

  Llandygai Tunnel ⓘ
  railway tunnel at Llandygai in Gwynedd, North Wales, UK

• 

  Old Moelwyn Tunnel ⓘ
  abandoned tunnel of the Ffestiniog Railway in Wales

• 

  Pont-y-Pant Lower Tunnel ⓘ
  railway tunnel in the UK

• 

  Pont-y-Pant Upper Tunnel ⓘ
  railway tunnel in the UK

• 

  Tregarth Tunnel ⓘ
  railway tunnel in the UK

• 

  Tunnel beneath Bangor Road at Plas Ty Coch ⓘ
  Grade II listed building in Caernarfon. On the E side of the house.

• 

  Tunnel Passage At Fort Williamsburg ⓘ
  

• 

  Tunnel Portal and Tunnel ⓘ
  Grade II listed building in Llanllyfni. Located in the hillside to the north of Talysarn Hall.

• 

  Vaynol Tunnel ⓘ
  

• 

  New Moelwyn Tunnel ⓘ
  tunnel of the Ffestiniog Railway in Wales

1700-01-01T00:00:00Z

1930-01-01T00:00:00Z

1700 — 1930 Glynrhonwy Quarries

1780-01-01T00:00:00Z

1884-01-01T00:00:00Z

1780 — 1884 Bryn Hafod-y-Wern quarry

1787-01-01T00:00:00Z

1968-07-01T00:00:00Z

1787 — 1968 Dinorwic Quarry

1800-01-01T00:00:00Z

1800-01-01T00:00:00Z

1800 Maenofferen Quarry

1810-01-01T00:00:00Z

1997-01-01T00:00:00Z

1810 — 1997 Cwmorthin quarry

1840-01-01T00:00:00Z

1960-01-01T00:00:00Z

1840 — 1960 Hafod y Llan Slate Quarry

1847-01-01T00:00:00Z

1847-01-01T00:00:00Z

1847 Llechwedd quarry

1862-01-01T00:00:00Z

1979-01-01T00:00:00Z

1862 — 1979 Pen-yr-Orsedd quarry

1867-01-01T00:00:00Z

1867-01-01T00:00:00Z

1867 Gimlet quarry

1900-01-01T00:00:00Z

1900-01-01T00:00:00Z

1900 Fron Slate Quarry

1972-01-01T00:00:00Z

1972-01-01T00:00:00Z

1972 National Slate Museum

1977-01-01T00:00:00Z

1977-01-01T00:00:00Z

1977 New Moelwyn Tunnel

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Type	Subtype	Date	Description	Notes	Source
link	page		British Listed Buildings page@		Wikidata
link	page		listed building page@		Wikidata
site	cave		Rotunda or Grotto	grotto	Wikidata
site	cave		The Mill Folly Grotto including stone bridge, south of the Afon Llifon	grotto	Wikidata
site	mine		Aberglaslyn West, Plas Hebog, Stone Quarry.	stone quarry	Wikidata
site	mine		Aberglaslyn, Parc Cae Morys, Stone Quarry	stone quarry	Wikidata
site	mine		Alexandra Quarry	slate quarry	Wikidata
site	mine		Alexandra quarry	quarry	Wikidata
site	mine		Berw Colliery	coal mine	Wikidata
site	mine		Blaen y Cae Slate Quarry	quarry	Wikidata
site	mine		Blaen y Cwm Quarry	quarry	Wikidata
site	mine		Braich Ty Du: Quarry	stone quarry	Wikidata
site	mine		Bwlch Cwmllan quarry	slate mine	Wikidata
site	mine		Bwlch y Cwm quarry	quarry	Wikidata
site	mine		Bwlch y Slaters quarry	quarry	Wikidata
site	mine		Bwlch-y-groes quarry	slate mine	Wikidata
site	mine		Bwlch-Y-Plwm	lead mine	Wikidata
site	mine		Caer Llugwy Lead Mine	lead mine	Wikidata
site	mine		Carreg yr Imbill	dolerite, quarry, peninsula	Wikidata
site	mine		Carreg-y-Llam quarry	quarry	Wikidata
site	mine		Cefn-Du quarry	slate mine	Wikidata
site	mine		Chwarel Ddu	quarry	Wikidata
site	mine		Chwarel y Bryn	quarry	Wikidata
site	mine		Cilgwyn quarry	quarry	Wikidata
site	mine		Coed Mawr quarry	quarry	Wikidata
site	mine		Conglog Slate Quarry	slate quarry	Wikidata
site	mine		Croesor Quarry	slate mine	Wikidata
site	mine		Cwm Eigiau quarry	quarry	Wikidata
site	mine		Cwm Erch Copper Mine	copper mine	Wikidata
site	mine		Cwt y Bugail quarry	quarry	Wikidata
site	mine		Diphwys Casson quarry	quarry	Wikidata
site	mine		Dorothea Quarry	quarry	Wikidata
site	mine		Drws y Coed Copper Mine	copper mine	Wikidata
site	mine		Eifl quarry	quarry	Wikidata
site	mine		Fron-Boeth and Pant Mawr Quarries	slate quarry	Wikidata
site	mine		Gallt-y-Llan quarry	quarry	Wikidata
site	mine		Gamallt Lead Mine	lead mine	Wikidata
site	mine		Gamallt Lead Mine	lead mine	Wikidata
site	mine		Gamallt Lead Mines	lead mine	Wikidata
site	mine		Gilfach Copper Mine	copper mine	Wikidata
site	mine		Glanrafon Slate Quarries	slate quarry	Wikidata
site	mine		Gorseddau Slate Quarry	slate quarry	Wikidata
site	mine		Graig Ddu quarry	quarry	Wikidata
site	mine		Gyrn Ddu quarry	quarry	Wikidata
site	mine		Gyrn quarry	stone quarry	Wikidata
site	mine		Llanberis Mine	copper mine	Wikidata
site	mine		Llandonna Lead Mine	lead mine	Wikidata
site	mine		Llechwedd Slate Caverns	slate mine, tourist attraction, organization	Wikidata
site	mine		Llyn Y Manod	lead mine	Wikidata
site	mine		Llyn Y Manod Mine	lead mine	Wikidata
site	mine		Moel Bowydd Zinc and Lead Mine	lead mine	Wikidata
site	mine		Moel Siabod Hone Quarry	stone quarry	Wikidata
site	mine		Moel Tryfan quarry	quarry	Wikidata
site	mine		Moelfaban quarry	quarry	Wikidata
site	mine		Moelwyn Slate Quarry	quarry	Wikidata
site	mine		Nyth-y-Gigfran Quarry	quarry	Wikidata
site	mine		Oakeley Quarry	quarry	Wikidata
site	mine		Pantdreiniog quarry	quarry	Wikidata
site	mine		Parc quarry	quarry	Wikidata
site	mine		Pen y Bryn / Cloddfa'r Lôn water-driven pump system	quarry	Wikidata
site	mine		Pen Y Bryn Quarry and tips	quarry	Wikidata
site	mine		Pen-Yr-Allt Lead Mine	lead mine	Wikidata
site	mine		Penrhyn Quarry	quarry	Wikidata
site	mine		Penrhyn Quarry: relict areas, quarry hospital and underground levels	quarry	Wikidata
site	mine		Porth y Nant Stone Quarry	stone quarry	Wikidata
site	mine		Prince Llewellyn quarry	quarry	Wikidata
site	mine		Prince of Wales Slate Quarry	slate quarry	Wikidata
site	mine		Pwll Vivian	quarry lake	Wikidata
site	mine		Rhiw-goch quarry	quarry	Wikidata
site	mine		Rhiwbach Quarry	quarry, railway	Wikidata
site	mine		Rhos quarry	quarry	Wikidata
site	mine		Rhosydd Quarry	slate quarry, mine	Wikidata
site	mine		Sygun Copper Mine	copper mine, mining museum	Wikidata
site	mine		Ty-mawr Quarries	coal mine	Wikidata
site	mine		Ty'n-y-Bryn quarry	quarry	Wikidata
site	mine		Tyddyn-Du	manganese mine	Wikidata
site	mine		Unknown	quarry	Wikidata
site	mine		Unknown	quarry	Wikidata
site	mine		Vivian Slate Quarry	quarry	Wikidata
site	mine		Wrysgan Quarry	quarry	Wikidata
site	mine	1700	Glynrhonwy Quarries	quarry	Wikidata
site	mine	1780	Bryn Hafod-y-Wern quarry	quarry	Wikidata
site	mine	1787	Dinorwic Quarry	archaeological site, quarry	Wikidata
site	mine	1800	Maenofferen Quarry	quarry	Wikidata
site	mine	1810	Cwmorthin quarry	slate mine, slate quarry	Wikidata
site	mine	1840	Hafod y Llan Slate Quarry	slate quarry	Wikidata
site	mine	1847	Llechwedd quarry	quarry	Wikidata
site	mine	1862	Pen-yr-Orsedd quarry	quarry	Wikidata
site	mine	1867	Gimlet quarry	quarry	Wikidata
site	mine	1900	Fron Slate Quarry	slate quarry	Wikidata
site	museum	1972	National Slate Museum	industry museum, national museum, Amgueddfa Cymru – Museum Wales, mining museum	Wikidata
site	tunnel		Aberglaslyn Long Tunnel	railway tunnel	Wikidata
site	tunnel		Aberglaslyn Short Tunnel	railway tunnel	Wikidata
site	tunnel		Bangor railway tunnel	railway tunnel	Wikidata
site	tunnel		Blaenau Tunnel	railway tunnel	Wikidata
site	tunnel		Caernarfon Tunnel	railway tunnel, road tunnel	Wikidata
site	tunnel		Glan-y-Bala Tunnel	railway tunnel	Wikidata
site	tunnel		Goat Tunnel	railway tunnel	Wikidata
site	tunnel		Llanberis Tunnel	railway tunnel	Wikidata
site	tunnel		Llandygai Tunnel	railway tunnel	Wikidata
site	tunnel		Old Moelwyn Tunnel	railway tunnel	Wikidata
site	tunnel		Pont-y-Pant Lower Tunnel	railway tunnel	Wikidata
site	tunnel		Pont-y-Pant Upper Tunnel	railway tunnel	Wikidata
site	tunnel		Tregarth Tunnel	railway tunnel	Wikidata
site	tunnel		Tunnel beneath Bangor Road at Plas Ty Coch	tunnel	Wikidata
site	tunnel		Tunnel Passage At Fort Williamsburg	tunnel	Wikidata
site	tunnel		Tunnel Portal and Tunnel	railway tunnel	Wikidata
site	tunnel		Vaynol Tunnel	railway tunnel	Wikidata
site	tunnel	1977	New Moelwyn Tunnel	railway tunnel	Wikidata