present, including raptors such as the red kite and common buzzard, as well as red grouse, whinchat, European stonechat, northern wheatear and the white-throated dipper at or near the many streams in the forest. Radnorshire Wildlife Trust maintain the 33 hectare Mynydd Ffoesidoes Nature Reserve on the summit plateau. Archaeology The topmost parts of the forest exhibit several Bronze Age round barrows, and there are also several ring cairns in the area. Most occur on or near the peaks, such as Black Mixen and Bache Hill. Prehistoric settlement is shown by hut circles often present as distinctive platforms. On the west side of Harley Dingle is a distinctive landscape feature known as "The Three Wriggles", a set of three gulleys running down the mountain slope on the western side of the Harley valley. There is also some evidence for mining activity. The town of New Radnor was a planned Norman settlement, and there is a large mound just to the north of the town marking the site of a motte and bailey castle. Radnor Range The forest was exploited as a military training area during the Second World War, and has remnants of such activity such as bomb craters and slit trenches. The Harley Dingle site was used by Imperial Chemical Industries' defence arm during the 1920s. It was subsequently used in connection with the development of rocket motors and other weapons systems. Now operated by Radnor Range Ltd, it is still used for testing ammunition and ordnance. A public exclusion zone exists around the facility with multiple warning flags and signs at the boundaries of the range. The zone was extended during 2017. Beyond the exclusion zone, further land to the west of Black Brook is subject to restricted access due to the presence of unexploded ordnance. Waterfall The area is home to a waterfall or cascade which is known as "Water Break-its-neck". The Waterfall has been popular with tourists for over 200 years and was an especially popular destination for Victorian tourists. It can be reached via a short rough track or forestry road from the A44 main road from Kington to Aberystwyth, shortly after New Radnor, and there is a small car park for visitors to the Warren Wood reserve maintained by Natural Resources Wales. The cascade can be reached via a short walkway beside the river in the hanging valley. There are two other small car