Sgwd yr Eira waterfall on the Afon Mellte river near Ystradfellte, Brecon Beacons National Park, Powys, Wales, United Kingdom, Europe

Cascade of Afon Lloer looking towards Tryfan Mountain, Snowdonia National Park (Eryri), Wales, United Kingdom

Water cascading down a fall on the Afon Lloer, overlooking the Ogwen Valley and Tryfan in the Glyderau mountain range, Snowdonia, Wales, United Kingdom, Europe

Swallow Falls, Waterfall, Afon Llugwy River, near Betws-y-Coed, North Wales, Wales, United Kingdom, Europe

Stone Slab Packhorse Bridge over the Afon Cwm Llan, Cwm Llan, The Watkin Path, Snowdonia National Park (Eryri), North Wales, United Kingdom, Europe

Water cascading down a fall on the Afon Lloer, overlooking the Ogwen Valley and Tryfan in the Glyderau mountain range, Snowdonia, Wales, United Kingdom, Europe

Sgwd Gwladus waterfall on the Afon Pyrddin river, Brecon Beacons National Park, Wales, United Kingdom, Europe

Afon Nant Peris, Snowdonia National Park, Wales, United Kingdom, Europe

Afon Nant Peris, Snowdonia National Park, Wales, United Kingdom, Europe

Sqwd Ddwli Waterfall, near Pontneddfechan, Afon Pyrddin, Powys, Brecon Beacons National Park, Wales, United Kingdom, Europe

Sqwd Ddwli Waterfall, near Pontneddfechan, Afon Pyrddin, Powys, Brecon Beacons National Park, Wales, United Kingdom, Europe

Sgwd Gwladys (Lady Falls), Afon Pyrddin, near Pontneddfechan, Brecon Beacons National Park, Powys, Wales, United Kingdom, Europe

Unusual beach waterfall where the Afon Drywi tumbles over Silurian Grits into Little Quay Bay, New Quay, Ceredigion, Wales, United Kingdom, Europe

Waterfalls on the Afon Cwm Llan, Cwm Llan, The Watkin Path, Snowdonia National Park (Eryri), North Wales, United Kingdom, Europe

Sgwd Ddwli Uchaf, waterfall on Afon Nedd Fechan, near Ystradfellte, Brecon Beacons, National Park, Wales, United Kingdom, Europe

Sgwd Gwladys (Lady Falls), Afon Pyrddin, near Pontneddfechan, Brecon Beacons National Park, Powys, Wales, United Kingdom, Europe

Ripples and Stone Patterns in the clear water of Afon Cwm Llan, Cwm Llan, The Watkin Path, Snowdonia National Park (Eryri), North Wales, United Kingdom, Europe

Afon Glaslyn River and Glaslyn Marshes, Site of Special Scientific Interest, with snow on mountains of Snowdon Horseshoe in winter, Porthmadog, Gwynedd, North Wales, United Kingdom, Europe

Scenic view with old rowing boat moored on bank in calm water on River Dovey (Afon Dyfi) looking north in low winter sunlight, Glandyfi, Ceredigion, Dyfed, Wales, United Kingdom, Europe

Afon Artro passing through natural oak wood, Llanbedr, Gwynedd, Wales, United Kingdom, Europe

Waterfall on Afon Llugwy, Betws-Y-Coed, Wales, United Kingdom, Europe

Plastic debris trapped in riverside branches, Afon Rhymney, Machen, Wales

Plastic debris trapped in riverside branches, Afon Rhymney, Machen, Wales

Plastic debris trapped in riverside branches, Afon Llynfi, Caerau Wales (rr)