Folk dance performance in front of Jade Dragon Snow Mountain in Lijiang, Yunnan, China (@ Bob Krist/Corbis)

Folk dance performance in front of Jade Dragon Snow Mountain in Lijiang, Yunnan, China (@ Bob Krist/Corbis)

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Aerial view of turquoise waters and sandbars in Oahu, Hawaii, U.S.A. (@ Lynn Gail/Lonely Planet Images)

Aerial view of turquoise waters and sandbars in Oahu, Hawaii, U.S.A. (@ Lynn Gail/Lonely Planet Images)

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Atlantic spotted dolphin pod swimming near the Azores, Atlantic Ocean (@ Wil Meinderts/Corbis)

Atlantic spotted dolphin pod swimming near the Azores, Atlantic Ocean (@ Wil Meinderts/Corbis)

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Indian saris drying in the sun (@ Grant Faint / Getty Images)

Indian saris drying in the sun (@ Grant Faint / Getty Images)

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A hummingbird feeds on the nectar of flowers (@ Kennan Ward / Footage Search)

A hummingbird feeds on the nectar of flowers (@ Kennan Ward / Footage Search)

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Whitewater rafting trip on the Colorado River in Marble Canyon, Grand Canyon National Park, Arizona, U.S.A. (@ Blaine Harrington III/Alamy)

Whitewater rafting trip on the Colorado River in Marble Canyon, Grand Canyon National Park, Arizona, U.S.A. (@ Blaine Harrington III/Alamy)

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Students with white hats and red noisemakers at a baseball game in Osaka, Japan (@ Arthur Meyerson/Aurora Photos)

Students with white hats and red noisemakers at a baseball game in Osaka, Japan (@ Arthur Meyerson/Aurora Photos)

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Crab Nebula (@ STScI/NASA/Corbis)

Crab Nebula (@ STScI/NASA/Corbis)

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Boardwalk in Yellowstone National Park, Wyoming, U.S.A. (@ Thomas Kokta/Masterfile)

Boardwalk in Yellowstone National Park, Wyoming, U.S.A. (@ Thomas Kokta/Masterfile)

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Sunrise during the summer solstice at Stonehenge, England (@ Alan Copson/Corbis)

Sunrise during the summer solstice at Stonehenge, England (@ Alan Copson/Corbis)

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Indiana Dunes State Park, Dunes National Lakeshore in Porter, Indiana, U.S.A. (@ Johnny Stockshooter/Aurora Photos)

Indiana Dunes State Park, Dunes National Lakeshore in Porter, Indiana, U.S.A. (@ Johnny Stockshooter/Aurora Photos)

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Floating Musical Fountain at Shanghai World Expo 2010, Shanghai, China (@ Yi Lu / Corbis)

Floating Musical Fountain at Shanghai World Expo 2010, Shanghai, China (@ Yi Lu / Corbis)

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An adult male Asian paradise flycatcher feeding a chick (@ mcb bank bhalwal/Getty Images)

An adult male Asian paradise flycatcher feeding a chick (@ mcb bank bhalwal/Getty Images)

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School children exercising in Beijing, China (@ Christian Kober/Corbis)

School children exercising in Beijing, China (@ Christian Kober/Corbis)

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Aquarium in the Oceanografic Park of Valencia, Spain (@ Rudi Sebastian/plainpicture)

Aquarium in the Oceanografic Park of Valencia, Spain (@ Rudi Sebastian/plainpicture)

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Tourists take boats as they visit an expanse of flowering cole fields near Xinghua city, in China's Jiangsu province (@ Wang Kaicheng/Xinhua Press/Corbis)

Tourists take boats as they visit an expanse of flowering cole fields near Xinghua city, in China's Jiangsu province (@ Wang Kaicheng/Xinhua Press/Corbis)

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Gentoo penguins in Gerlache Strait, Antarctica (@ Momatiuk–Eastcott/Corbis)

Gentoo penguins in Gerlache Strait, Antarctica (@ Momatiuk–Eastcott/Corbis)

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Spinning carnival rides at the Kansas State Fair in Hutchinson, Kansas, U.S.A. (@ Joel Sartore/Corbis)

Spinning carnival rides at the Kansas State Fair in Hutchinson, Kansas, U.S.A. (@ Joel Sartore/Corbis)

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Rider on a theme-park water slide (@ Peter Essick/Aurora Photos)

Rider on a theme-park water slide (@ Peter Essick/Aurora Photos)

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Kayakers on Eagle Creek in the Columbia River Gorge, Oregon, U.S.A. (@ Ty Milford/Aurora Photos)

Kayakers on Eagle Creek in the Columbia River Gorge, Oregon, U.S.A. (@ Ty Milford/Aurora Photos)

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Timothy grass pollen (@ Bob Sacha/Corbis)

Timothy grass pollen (@ Bob Sacha/Corbis)

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Aerial view of boats in the Tyrrhenian Sea, off the coast of Capri, Italy (@ Glowimages/Getty Images)

Aerial view of boats in the Tyrrhenian Sea, off the coast of Capri, Italy (@ Glowimages/Getty Images)

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The Goosenecks of the San Juan River, Goosenecks State Park near Mexican Hat, Utah, U.S.A. (@ Universal Images Group/SuperStock)

The Goosenecks of the San Juan River, Goosenecks State Park near Mexican Hat, Utah, U.S.A. (@ Universal Images Group/SuperStock)

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The Palm Islands artificial archipelago in Dubai, United Arab Emirates (@ Jochem Wijnands/age fotostock)

The Palm Islands artificial archipelago in Dubai, United Arab Emirates (@ Jochem Wijnands/age fotostock)

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Meerkats in Namibia (@ Gerard Lacz/age fotostock)

Meerkats in Namibia (@ Gerard Lacz/age fotostock)

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