At Winch Fawr, on the northeastern slopes of Mynydd Aberdar, is a spectacular industrial landscape of eighteenth century and nineteenth century coal and ironstone levels, with hushing channels and gouges.
Sources:
A Guide to the Industrial Archaeology of South East Wales, AIA, 2003
Winch Mawr (Coal and ironstone) (OS 6-inch Map 1879).
Winch Fawr (dis) (OS 6-inch Map 1905/1914).

Claire Parry, RCAHMW, 17 June 2011.