Allt Lwyd
 Allt Lwyd is a top of Waun Rydd in the Brecon Beacons National Park in southern Powys Wales.The summit is heathery and marked by a small pile of stones. It is found at the end of Waun Rydd's south-east ridge. It overlooks Talybont Reservoir and has the Talybont Forest on its steep flanks.