Powys is a county and preserved county in Wales. It borders Gwynedd, Denbighshire, and Wrexham to the north; the English ceremonial counties of Shropshire and Herefordshire to the east; Monmouthshire, Blaenau Gwent, Merthyr Tydfil, Caerphilly, Rhondda Cynon Taf, and Neath Port Talbot to the south; and Carmarthenshire and Ceredigion to the west. The largest settlement is Newtown, and the administrative centre is Llandrindod Wells.
Llanrhaeadr-ym-Mochnant is a village, community and an ecclesiastical parish in the extreme north of Powys, Wales; about 9 miles west of Oswestry and 12 miles south of Llangollen, on the B4580. It lies near the foothills of the Berwyn mountains on the river Rhaeadr. At the top end of the valley is the Pistyll Rhaeadr waterfall, one of the Seven Wonders of Wales in the old rhyme. One mile north of the town is the hill Moel Hen-fache. The community includes the hamlet of Llanarmon Mynydd Mawr.
The Afon Mawddach is a river in Gwynedd, Wales, which has its source in a wide area SH820300 north of Dduallt in Snowdonia. It is 28 miles (45 km) in length, and is much branched; many of the significant tributaries are of a similar size to the main river. The catchment area is bounded to the east by the Aran Fawddwy massif and to the west and north by the Harlech dome which forms a watershed just south of Llyn Trawsfynydd.
The River Teifi in Wales forms the boundary for most of its length between the counties of Ceredigion and Carmarthenshire, and for the final 3 miles (4.8 km) of its total length of 76 miles (122 km), the boundary between Ceredigion and Pembrokeshire. Its estuary is northwest of Cardigan, known in Welsh as Aberteifi, meaning 'mouth of the Teifi'. Teifi has formerly been anglicised as "Tivy".
Afon Rheidol is a river in Ceredigion, Wales, 19 miles (31 km) in length. The source is Plynlimon. Receiving an average annual rainfall of 40 inches (1.02 m), Plynlimon is also the source of both the Wye and the Severn.
Afon Ogwen is a river in north-west Wales draining from some of the greatest peaks in Snowdonia before discharging to the sea on the eastern side of Bangor, Gwynedd.
Pistyll Rhaeadr is a waterfall 4 miles from the village of Llanrhaeadr-ym-Mochnant in Powys, Wales, and 16 miles west of Oswestry.
Llyn Idwal is a small lake that lies within Cwm Idwal in the Glyderau mountains of Snowdonia.
The Grey Mare's Tail is a waterfall on the very edge of the Snowdonia National Park near Gwydir Castle in Conwy County Borough, north Wales. It lies just off the B5106 road between the town of Llanrwst and the large village of Trefriw. The Welsh name, Rhaeadr y Parc Mawr, derives from the fact that the falls are fed by a large stream that has its source in the Gwydir Forest, and flows through the old Parc Mine, about a mile to the southeast. The name 'Grey Mare's Tail' was given to it by Lady Willoughby of Gwydir Castle, possibly "in compliment to Lord Byron and the Staubbach"
Waterfall Country is a name often given to the upper reaches of the Vale of Neath in South Wales. The tourist area around the head of the valley has an unusually large number of publicly accessible waterfalls. The area is not officially defined but generally includes the group of falls on the Nedd Fechan, Pyrddin, Hepste and Mellte rivers, all of which lie between the villages of Pontneddfechan and Ystradfellte in the Brecon Beacons National Park.
The Afon Llyfnant, also known as the River Llyfnant, is a short river in Ceredigion, on the west coast of Wales. The river rises in the mountains south of Machynlleth, reaches the hill walk of Uwch Garreg and then plunges over a series of waterfalls known as Pistyll y Llyn, into a ravine, descending towards the River Dyfi near Dovey Junction railway station.
The Devil's Appendix is the tallest single-drop waterfall in Wales and one of the tallest in the United Kingdom. It is a plunge style waterfall located on the Clogwyn y Geifr cliffs beside Twll Du in Cwm Idwal, Snowdonia, Wales.
The Afon Sychryd is a river in Rhondda Cynon Taf, Wales. Although it is a relatively short river, with a total length of 3 miles (5 km), it is notable for the gorge and two waterfalls through which it flows.
Nant-y-Ffrith refers to a stream and the wooded valley through which it flows on the border between Flintshire and Wrexham County Borough in Wales. The stream begins in moorland to the east of Llandegla. It passes Bwlchgwyn village before entering a rather steep-sided, rocky valley. It passes under the viaduct of a disused railway line before joining the River Cegidog at Ffrith.
The Rhaeadr y Cwm is a waterfall on the Afon Cynfal river in Gwynedd, North Wales. The falls are located near the B4391 road, some 3 miles (5 km) east of Ffestiniog.
