This reserve, once the site of extensive coal mining, is a great example of how nature has reclaimed the landscape. It is a rich mix of wildlflower meadow, rhos pasture and young woodland. It is one of the best sites in Wales for the rare marsh fritillary butterfly.
The reserve consists of three wildflower meadows and a large area of woodland. The reserve lies on the site of a former coal-mine and is a wonderful example of how nature can reclaim an area.
Cwm Wanderers once played football on this site. It is now a nature reserve of wet tussocky grassland known as Rhos pasture. It is home to the rare marsh fritillary butterfly.
The Pen y Waun nature reserve consists of two small fields situated on the edge of Waun-y-Mynach common. The fields were former garden plots for nearby cottages.
This reserve is a good example of a traditional wildflower meadow, a rare habitat in these days of intensively managed farmland where large quantities of both fertiliser and grazing animals are applied to meadows that may have once looked like this, but are now bright green with very few plant species surviving.