hikers ascending pen-y-fan in the brecon beacons from the cwm gwdi ridge on the north side

cwm gwdi wales bannau brycheiniog beacons beautiful brecon british corn country countryside dramatic green high hike hiker hiking hill hills landscape llwyn mountain national park natural nature outdoor outdoors peak pen fan penyfan ridge rugged rural scenery scenic summer tourism trail valley walking welsh wilderness hikers ascending pen-y-fan north side