The Centre for Alternative Technology was founded in 1973 on the site of Llwyn-gwern slate quarry near Machynlleth. Since then, it has grown to become Europe's leading eco-centre. There are numerous interactive exhibits and displays concerned with the search for globally sustainable, whole and ecologically sound technologies and ways of life.

B.A.Malaws, RCAHMW, 27 September 2001.

For Llwyngwern Slate Quarry see NPRN 407582.