At Ystradfelle in the Brecon Beacons you will find the highest concentration of waterfalls in Wales. The area is incredibly popular with tourists, whatever the weather. In fact during bad weather is sometimes the best time to visit. If it has been raining heavily the falls are at their most dramatic and if there has been a prolonged cold spell the waterfalls are sometimes frozen. The most well known of the falls is Sgwd Yr Eira.