In the historic landscape of Llanddeiniolen/Dinorwic, the hillfort of Dinas Dinorwig dominates. Together with its slate heritage, religious buildings and traces of working life, it offers several ways to explore the area’s history. Those considering Llanddeiniolen as a destination can shape their stay around different interests: landscape and industry, architectural history or the social side of quarrying. The themes range from a striking hillfort to the work sites of the Dinorwic Slate Quarry.
Religious architecture and ancient yew trees
Ebeneser Independent Chapel was founded in 1823 and rebuilt in the neoclassical style in 1858. The two dates mark different stages: 1823 denotes its founding, while 1858 marks its later neoclassical reconstruction. The churchyard of St Deiniol's Church is home to ancient yew trees, some of which are locally said to be more than 2,000 years old. These two features add religious architectural history and a locally transmitted timespan to the story of slate.
The Dinorwic slate landscape
The Dinorwic Slate Quarry operated from around 1770 to 1969. Today it is a preserved historic industrial landscape, with stepped rock faces, inclined planes, spoil heaps and a process-flow layout. Together, these features of the terrain tell the story not only of extraction, but also of how processing was organised. The quarry is Component Part 2, “Dinorwig Quarry Mountain Landscape”, of the UNESCO World Heritage Site “Slate Landscape of Northwest Wales”. Thus, the distinctive features of a historic industrial landscape sit alongside its place within a larger, named World Heritage Site.
Workshops, waterwheel and railway
The Welsh Slate Museum is housed in the former workshops of the Dinorwic Slate Quarry. The workshops’ restored waterwheel has a diameter of 15.4 metres, is the second largest in Britain, and once supplied all the workshops’ power. A 4-foot-gauge railway was built by the lakeside in 1843 and served the quarry until 1961. Its use therefore ended before quarry operations, which continued until around 1969, came to an end.
The people of the quarry
The complex known as Anglesey Barracks, also called Y dre' newydd, is the best-preserved of several barrack complexes once used within Dinorwic Quarry. It housed mostly less-skilled quarry workers who lived too far away to commute to work each day; they included workers from the neighbouring county of Anglesey. Alongside rock and technology, this brings the employees’ living and working conditions into focus.
Exploration advice
Access is an important consideration when exploring quarry remains. Parts of the slate landscape in northwest Wales can be remote, hazardous and challenging; a significant portion is privately owned, and some areas have no public access. Check access arrangements before exploring quarry remains.
Discover more destinations: Dinas-Mawddwy, Llandderfel, Criccieth, Llanberis, Barmouth, Llanarmon, Clynnog-Fawr, Betws Garmon
For the regional travel overview: Gwynedd.
