Aerial view of Lake Kariba, the world's largest man-made lake and reservoir by volume, Zimbabwe, Africa

Aerial view of Lake Kariba, the world's largest man-made lake and reservoir by volume, Zimbabwe, Africa

Aerial view of Lake Kariba, the world's largest man-made lake and reservoir by volume, Zimbabwe, Africa

Sunset over Lake Kariba, the world's largest man-made lake and reservoir by volume, Zimbabwe, Africa

Planting native English trees around the fells above Thirlmere Reservoir in the Lake District, Cumbria, England, United Kingdom, Europe

Planting native English trees around the fells above Thirlmere Reservoir in the Lake District, Cumbria, England, United Kingdom, Europe

Hayeswater reservoir above Hartsop in Patterdale in unseasonally cold weather in late March 2013, Lake District, Cumbria, England, United Kingdom, Europe

A man holds up a toad flattened by a car next to a Toad crossing warning sign on a road near Stocks Reservoir in Lancashire, England, United Kingdom, Europe

Thirlmere reservoir the day before a hosepipe ban came into effect in the North West, Lake District, Cumbria, England, United Kingdom, Europe

Rainbow and man by from the overspill from the Karahnjukar dam and Halslon reservoir, North East Iceland, Iceland, Polar Regions

Mountaineer by the overspill from the Karahnjukar dam and Halslon reservoir, North East Iceland, Iceland, Polar Regions

A man holds up a toad flattened by a car next to a Toad crossing warning sign on a road near Stocks Reservoir in Lancashire, England, United Kingdom, Europe

A small reservoir dug out in an attempt to find water, the new building in the background has been built on the original lake bed level, Hong Hai Zai, near Dongsheng, Inner Mongolia, China, Asia

Karahnjukar dam and Halslon reservoir, North East Iceland, Iceland, Polar Regions

Legs of Caucasian man sitting at the edge of reservoir

Caucasian man at the edge of reservoir wearing backpack

Caucasian man sitting at the edge of reservoir wearing backpack

Traditional music of Galicia. Gaiteiros Rio de anxo. Old Town, Santiago de Compostela, UNESCO World Heritage Site, Galicia, Spain. Bagpipes are a woodwind instrument using enclosed reeds fed from a constant reservoir of air in the form of a bag. The Scottish Great Highland bagpipes are the best known examples in the Anglophone world, but people have played bagpipes for centuries throughout large parts of Europe. The term bagpipe is equally correct in the singular or the plural, though pipers usually refer to the bagpipes as the pipes, a set of pipes or a stand of pipes.

Traditional music of Galicia. Gaiteiros Rio de anxo. Old Town, Santiago de Compostela, UNESCO World Heritage Site, Galicia, Spain. Bagpipes are a woodwind instrument using enclosed reeds fed from a constant reservoir of air in the form of a bag. The Scottish Great Highland bagpipes are the best known examples in the Anglophone world, but people have played bagpipes for centuries throughout large parts of Europe. The term bagpipe is equally correct in the singular or the plural, though pipers usually refer to the bagpipes as the pipes, a set of pipes or a stand of pipes.

Traditional music of Galicia. Gaiteiros Rio de anxo. Old Town, Santiago de Compostela, UNESCO World Heritage Site, Galicia, Spain. Bagpipes are a woodwind instrument using enclosed reeds fed from a constant reservoir of air in the form of a bag. The Scottish Great Highland bagpipes are the best known examples in the Anglophone world, but people have played bagpipes for centuries throughout large parts of Europe. The term bagpipe is equally correct in the singular or the plural, though pipers usually refer to the bagpipes as the pipes, a set of pipes or a stand of pipes.

Craig Goch reservoir at Elan Valley, Powys, Wales

Craig Goch reservoir at Elan Valley, Powys, Wales

Motorbike tours around Garmisch, Person having a rest at Sylvenstein Reservoir, Upper Bavaria, Bavaria, Germany

Man grilling fish on camp fire, camping on small island on lake, dusk, Valencia region, Spain

Hiker, young woman and young man on suspension bridge at the Olpererhuette, Schlegeis reservoir, Schlegeis reservoir, Zillertal Alps, Schlegeiskees glacier, Zillertal, Tyrol, Austria, Europe

Chand Baori stepwell, Abhaneri, at Jaipur, Rajasthan, North India, India, South Asia, Asia

Cross-country skier, right the Laengental Reservoir, Kuehtai, Sellrain Valley, Tyrol, Austria

Mountaineer during the ascent of Mt Grawand , Ortler Alps at the back, Val Senales below with the Vernagt Reservoir, Meraner Land area, Merano, Meran region, South Tyrol, Italy, Europe

Work on the dam of the Rappbode reservoir, Harz region, Saxony-Anhalt, Germany, Europe

Floating bungalows, Khao Sok National Park, man-made reservoir, Chiao Lan Lake, Surat Thani, Thailand, Asia

Khao Sok National Park, man-made reservoir, Chiao Lan Lake, Surat Thani, Thailand, Asia

A man and woman looking through their binoculars while birding at Utica Reservoir.

Pools Of Bethesda, Jerusalem, Israel

A Young Man Hanging On To A Tree Branch Leaning Out Over A Lake, Waterbury, Vermont, United States Of America

Martin Luther King Junior Memorial, Located On Four Acres Along Tidal Basin, Dedicated In 2011, 30 Foot Granite Sculpture Called Stone Of Hope By Lei Yixen, Washington Monument In The Background, Washington, District Of Columbia, United States Of America

Martin Luther King Junior Memorial, Located On Four Acres Along Tidal Basin, Dedicated In 2011, 30 Foot Granite Sculpture Called Stone Of Hope By Lei Yixen, Washington, District Of Columbia, United States Of America

Bronze Statue Depicting People Waiting On A Bread Line During The Great Depression, Franklin Delano Roosevelt Memorial, Washington, District Of Columbia, United States Of America

Pool Of Bethesda And Ruins Of The Byzantine Church, Jerusalem, Israel

A Young Man Stands At The Edge Of A Lake Holding On To A Leaning Tree, Waterbury, Vermont, United States Of America

Young Man Laying In A Hammock In A Forest, Little River State Park, Waterbury, Vermont, United States Of America

Young Man Standing In A Forest With A Cup Of Coffee, Little River State Park, Waterbury, Vermont, United States Of America