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Nantlle Railway and Old Talysarn is an industrial railway in Wales, protected by Cadw under reference CN420. The railway served the slate and other mineral extraction industries that characterised this region during the nineteenth and early twentieth centuries. Its route traversed challenging terrain underlain by Upper Cambrian bedrock of Tremadoc age, comprising interbedded sandstone and conglomerate that formed in the Tremadocian period over 500 million years ago.
The railway infrastructure reflects the engineering solutions required to transport extracted materials across the uneven landscape of the Welsh uplands. The geological foundation of sandstone and conglomerate presented both challenges and opportunities for development, as these same rocks contained valuable mineral deposits. The route connected quarries and workings to processing facilities and distribution points, demonstrating the integration of industrial infrastructure with the local geology.
Today the railway remains an important record of Wales's industrial heritage, illustrating the nineteenth-century exploitation of mineral resources and the technological advancement of transport systems in remote mountainous terrain. The surviving structures and route provide evidence of the region's economic importance during the industrial period, when such railways were essential to connecting Welsh mineral production with wider British and international markets.
Nantlle Railway and Old Talysarn is a scheduled monument protected by Cadw under reference CN420. View the official record →
Nantlle Railway and Old Talysarn is an industrial railway in Wales, protected by Cadw under reference CN420.
Nantlle Railway and Old Talysarn dates from the industrial period, and is classified as a railway. It is one of over 32,000 scheduled monuments protected across the UK.
Nantlle Railway and Old Talysarn is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is CN420.
Several scheduled monuments lie within 10 km, including Hut Circle Settlement Above Gilfach (6.3 km), Huts and Enclosures, Cwm Llefrith (8 km), Llystyn Gwyn Inscribed Stone (8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Nantlle Railway and Old Talysarn's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Nantlle Railway and Old Talysarn stands on Upper Cambrian, Including Tremadoc, bedrock that formed in the Tremadocian. The rock here is sandstone and conglomerate, interbedded.