The Great Water Wheel at the National Slate Museum, Gilfach Ddu, Wales
The National Slate Museum (previously known as the Welsh Slate Museum and the North Wales Quarrying Museum) is located at Gilfach Ddu, the 19th-century workshops of the now disused Dinorwic quarry, within the Padarn Country Park, Llanberis, Gwynedd. The museum is dedicated to the preservation and display of relicts of the Slate industry in Wales.
The museum is an anchor point of the European Route of Industrial Heritage (ERIH) and part of Amgueddfa Cymru – Museum Wales.
The museum also has the largest working waterwheel in mainland Britain, which is available for viewing via several walkways. The waterwheel was constructed in 1870 by De Winton of Caernarfon and is 50 ft 5 in (15.37 m) in diameter, 5 ft 3 in (1.60 m) wide and was built around a 12 in (305 mm) axle.
