Argentina, Misiones, Iguazu National Park. Abstract view of the impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. Abstract view of the impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. Tourists watch the impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. Tourist boat trip near the impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. Detail of the impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu National Park. The impressive Iguazu waterfalls – A world heritage site.

Argentina, Misiones, Iguazu. Exotic, tropical flower in jungle near to the Iguazu National Park.

England, Cumbria, Lake District National Park. Scale Force near the village of Buttermere within the Lake District National Park.

England, Cumbria, Lake District National Park. Scale Force near the village of Buttermere within the Lake District National Park.

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, Northumberland, Budle Bay. Dried mud in a pool after a heat wave in the summer of 2006

England, Northumberland, Budle Bay. Dried mud in a pool after a heat wave in the summer of 2006

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

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

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Warkworth Castle. Warkworth Castle (English Heritage), a magnificent 12th century stone motte and bailey fortress, located near the Northumberland Heritage Coast.

England, Northumberland, Northumberland National Park. A winter scene with the remains of snow on the river Breamish, running through the Cheviots and the Breamish valley near the village of Ingram situated within the Northumberland National Park in the northen england county of Northumberland about 8km east of the border with Scotland.

England, Northumberland, Northumberland National Park. A winter scene with the remains of snow on the river Breamish, running through the Cheviots and the Breamish valley near the village of Ingram situated within the Northumberland National Park in the northen england county of Northumberland about 8km east of the border with Scotland.

England, Northumberland, Northumberland National Park. A winter scene with the remains of snow on the river Breamish, running through the Cheviots and the Breamish valley near the village of Ingram situated within the Northumberland National Park in the northen england county of Northumberland about 8km east of the border with Scotland.

England, Northumberland, Northumberland National Park. A winter scene with the remains of snow on the river Breamish, running through the Cheviots and the Breamish valley near the village of Ingram situated within the Northumberland National Park in the northen england county of Northumberland about 8km east of the border with Scotland.

England, Northumberland, Northumberland National Park. A winter scene with the remains of snow on the river Breamish, running through the Cheviots and the Breamish valley near the village of Ingram situated within the Northumberland National Park in the northen england county of Northumberland about 8km east of the border with Scotland.