Thu 27 Dec 18 Elan Valley Nr Rhayader, Powys LD6 5HP A 4 mile guided walk to learn about the area, including the remains of Nant y Gro Dam which was used for tests before the WW2 Dambusters Raid. There is a steep climb of 40 metres up the steps to the top of the dam and then a very steep 140 metre climb. Meet at the Elan Valley Visitor Centre...