Despite the intense industrialisation of the coal mining valleys, many parts of the landscape of South Wales such as the upper Neath valley, the Vale of Glamorgan and the valleys of the River Usk and River Wye remain distinctly beautiful and unspoilt and have been designated Sites of Special Scientific Interest. In addition, many once heavily industrialised sites have reverted to wilderness, some provided with a series of cycle tracks and other outdoor amenities. Large areas of forestry and open moorland also contribute to the amenity of the landscape.