Ordnance Survey Brecon Becons / National Park OL 12Enhances your walk with information on rare wildlife, natural habitats and points of historical interest 1: 25 000 scale (4 cm to 1 km 2?? inches to 1 mile). Follow the Beacons Way from the village of Llangadog on the banks of the River Towy into the atmospheric Black Mountain country Walk, hike and climb paths including the Taff Trail, Usk Valley Walk and Beacons Way Delve into some of the wildest and most untouched areas of the Brecon Beacons