England, County Durham, Low Force. The River Tees cascades down the Low Force waterfall in County Durham.

England, County Durham, Low Force. The River Tees cascades down the Low Force waterfall in County Durham.

England, County Durham, Low Force. The River Tees cascades down the Low Force waterfall in County Durham.

Scotland, Scottish Highlands, Buachaille Etive Mòr. The River Etive over looked by the imposing peak of Buachaille Etive Mòr.

England, Cumbria, Lake District National Park. Rapids on Aira Beck, near the shores of Ullswater.

England, Cumbria, Lake District National Park. Rapids on Aira Beck, near the shores of Ullswater.

England, Cumbria, Lake District National Park. River Duddon and storm clouds above the Little Stand and Ulpha Fell.

England, Cumbria, Lake District National Park. River Duddon and storm clouds above the Little Stand and Ulpha Fell.

England, North Yorkshire, North York Moors National Park. Thomason Foss waterfall near Goathland in the North York Moors National Park.

England, North Yorkshire, North York Moors National Park. Thomason Foss waterfall near Goathland in the North York Moors National Park.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

England, Yorkshire, Yorkshire Dales National Park. The Strid flowing through Strid Wood, part of the Bolton Abbey Estate.

Scotland, Scottish Borders, Leithen Water. The gentle flowing rapids of Leithen Water.

Vietnam, Northern Vietnam, Sapa. Cat Cat Falls, a waterfall in Cat Cat village near Sapa.

Vietnam, Northern Vietnam, Sapa. Cat Cat Falls, a waterfall in Cat Cat village near Sapa.

Vietnam, Northern Vietnam, Sapa. Cat Cat Falls, a waterfall in Cat Cat village near Sapa.

Vietnam, Northern Vietnam, Sapa. Cat Cat Falls, a waterfall in Cat Cat village near Sapa.

Vietnam, Northern Vietnam, Sapa. Cat Cat Falls, a waterfall in Cat Cat village near Sapa.

New Zealand, Canterbury, Arthur's Pass National Park. Creek running into the Poulter River and the Poulter Valley.

New Zealand, Canterbury, Arthur's Pass National Park. Creek running into the Poulter River and the Poulter Valley.

New Zealand, Canterbury, Arthur's Pass National Park. Creek running into the Poulter River and the Poulter Valley.

Argentina, The Lake District, Parque Nacional Lanin. Fast flowing river downstream of the Lanin Volcano in the Lanin National Park.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Chile, Southern Patagonia, Torres Del Paine National Park. Rapids on the Rio de los Perro running through a forested gorge on the 'Circuit' track.

Scotland, Dumfries & Galloway, Grey Mare's Tail. The Grey Mares Tail waterfall, a popular tourist attraction managed by the National Trust for Scotland.

Scotland, Scottish Borders, The River Ettrick. A stone bridge over the fast flowing River Ettrick.

Scotland, Scottish Borders, The River Ettrick. A stone bridge over the fast flowing River Ettrick.

England, Cumbria, Lake District National Park. Wooden bridge stretching over rapids near Lake Buttermere in Cumbria.

England, Cumbria, Lake District National Park. Ashness Bridge and the fast rapids of the Barrow Beck

England, Cumbria, Lake District National Park. Ashness Bridge and the fast rapids of the Barrow Beck

England, Cumbria, Lake District National Park. Ashness Bridge and the fast rapids of the Barrow Beck

France, Rhône-Alpes, The Ecrins National Park. The la Romanche River flowing through a gorge in the mountains near La Grave.

France, Rhône-Alpes, The Ecrins National Park. The la Romanche River flowing through a gorge in the mountains near La Grave.

France, Rhône-Alpes, The Ecrins National Park. The fast rapids of the la Romanche river running near the Plan De Valfourone in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. The fast rapids of the la Romanche river running near the Plan De Valfourone in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. The fast rapids of the la Romanche river running near the Plan De Valfourone in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. The fast rapids of the la Romanche river running near the Plan De Valfourone in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. The fast rapids of the la Romanche river running near the Plan De Valfourone in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. Mountain stream running near the La Plan de l'Alpe in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. Mountain stream running near the La Plan de l'Alpe in the Ecrins National Park.

France, Rhône-Alpes, The Ecrins National Park. Mountain stream (Torrent de l'Abergue) running through a wild mountain landscape located near the village of La Grave and the Chal Vachere