Wern Plemys | The Wildlife Trust of South and West WalesThe nature reserve consists of three wildflower meadows and a large area of woodland. The nature reserve lies on the site of a former coal mine and is a wonderful example of how nature can reclaim an area.The nature reserve consists of three wildflower meadows and a large area of woodland. The nature reserve lies on the site of a former coal mine and is a wonderful example of how nature can reclaim an area. Location Nearest town is Ystradgynlais, SA9 1ES https://www.welshwildlife.org/nature-reserve/wern-plemys/