Double waterfall cascade at Venford Falls in Dartmoor National Park, Devon, England, United Kingdom, Europe

Double waterfall cascade at Venford Brook in Dartmoor National Park, Devon, England, United Kingdom, Europe

Double rainbow over Skogar Waterfall, Skogar, Iceland, Polar Regions

Double rainbow and tourists with hands in the air at Skogafoss waterfall in South Iceland, Polar Regions

Gullfoss, or Golden Waterfall, this double waterfall was saved from development for hydroelectric power in 1907, Gullfoss, Iceland

Double rainbow, Horseshoe Falls, Maid of the Mist, Niagara Falls, Ontario, Canada, North America

Double rainbow, Horseshoe Falls, Niagara Falls, Ontario, Canada, North America

Double rainbow, Horseshoe Falls, Maid of the Mist, Niagara Falls, Ontario, Canada, North America

Skogafoss waterfall with double rainbow, South Iceland, Iceland, Polar Regions

Iguacu or Iguazu Falls with a double rainbow, Brazilian side, UNESCO World Heritage Site, Iguacu National Park, Brazil, South America

Skógafoss waterfall, Skogafoss with double rainbow, Iceland, Europe

Double rainbow shining over a rugged waterfall and the Rocky Mountains, Jasper National Park; Alberta, Canada

Double rainbow shining over a rugged waterfall and the Rocky Mountains, Jasper National Park; Alberta, Canada

A Double Waterfall Drops Into Green Water In A Dark Canyon, Kananaskis Country, Alberta, Canada

A young asian female hiker poses for a self-portrait on the edge of the Haifoss waterfall valley, a popular hiking destination in Iceland, Iceland

Trafalgar Falls on the island of Dominica in the Caribbean, an incredible double waterfall, one of which runs hot, Dominica, West Indies