March 22 marks World Water Day, annually celebrated since 1993. The day focuses attention on the importance of universal access to clean water, sanitation and hygiene (WASH) facilities in developing countries, as well as advocating for the sustainable management of freshwater resources.
UN-Water, the United Nations inter-agency entity, selects a theme for each year's World Day for Water. In 2017, the "Why waste water?" theme highlights reducing and reusing wastewater.
Ban Gioc - Detian Falls, located on the international border between China and Vietnam.
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© AP Photo / Jorge Saenz
Iguazu Falls of the Iguazu River on the border of Argentina and Brazil.
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© Sputnik / Sergey Krivosheyev
A waterfall on the Kuril Islands, Russia.
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© AP Photo / Steffen Schmidt
The Rhine Falls in Switzerland, Europe's largest plain waterfall.
Angel Falls in Venezuela, the world's highest uninterrupted waterfall, with a height of 979 meters (3,212 feet).
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© AP Photo / Don Ryan
Tourists are backed by the cascading waters of the upper falls of Multnomah Falls in the Columbia River Gorge, Oregon, US.
The Blue Nile Falls, also known as Tis Issat or Tissisat Falls, in Ethiopia.
Seljalandsfoss, one of the best known waterfalls in Iceland.
Chinese tourists are pictured in Livingstone at Victoria Falls, located on the border between Zambia and Zimbabwe. Victoria Falls are recognized as one of the Seven Natural Wonders of the world.
Dettifoss in winter, Iceland. This waterfall is reputed to be the most powerful in Europe.
The Nachi waterfall in Nachikatsuura, Japan.
Gullfoss, an Icelandic waterfall believed to be one of the largest waterfalls in Europe.
The Cheonjiyeon Waterfall on Jeju Island, South Korea.
Yosemite Falls, the highest waterfall in North America in the Sierra Nevada mountain range at Yosemite National Park in California, US.
Jog Falls, also known as Joga Falls or Gerosoppa Falls, the highest plunge waterfall in India.
The skyline of Niagara Falls, Canada is seen from Niagara Falls, New York. The US Niagara Falls straddle the international border between Canada and the United States and include three waterfalls: the Horseshoe Falls, the American Falls and the Bridal Veil Falls.
