Aerial view of rice fields in Yunnan Province, China -- Jialiang Gao/Getty Images © (Bing United States)

Dead trees in Dead Vlei, Namib-Naukluft Park, Namibia -- Frank Krahmer/Corbis © (Bing United States)

The pearl monument in the Corniche neighborhood of Doha, Qatar, illuminated at night with the new high-rises of West Bay in the background (© Jon Hicks/Corbis) © (Bing United States)

Historical regatta in Venice, Italy (© SIME/eStock Photo) © (Bing United States)

Flag rigger on flagpole, Boston, Massachusetts (© John Burke/Photolibrary) © (Bing United States)

Cleaning behavior of blue-striped grunt and four-eyed butterfly fish, Florida Keys National Marine Sanctuary (© Stephen Frink/Corbis) © (Bing United States)

Aerial view of islands in a sand quarry, Jumieges, Seine Valley, France (© Francis Cormon/Corbis) © (Bing United States)

Rock Islands, a chain of small islets in the island nation of Palau in Micronesia (© Bob Krist/Corbis) © (Bing United States)

Early morning fog in Crete Senesi, Italy (© Fabio Muzzi/Corbis) © (Bing United States)

Firefighters hold a U.S. flag as they gather to pay their respects at Ground Zero during a 9/11 memorial ceremony on September 11, 2009, in New York City (© Chris Hondors/Getty Images) © (Bing United States)

A herd of guanacos (Lama guanicoe) in southern Patagonia, Torres del Paine National Park, Chile (© Steve Ogle/Corbis) © (Bing United States)

Aerial view of Lake Mead and land erosion near the border of Arizona and Nevada (© Lee Foster/Lonely Planet Images) © (Bing United States)

The Singapore Flyer, a 42-story-high observation wheel in Singapore (© David McLain/Aurora Photos) © (Bing United States)

Laguna Quilotoa in the Andes Mountains, Ecuador (© Heeb Photos / eStock Photo) © (Bing United States)

Cup fungi in Kinabalu National Park on the island of Borneo (© Frans Lanting/Corbis) © (Bing United States)

Oktoberfest tent, Spatenbräu, Munich, Germany (© Bodo Schieren/Photolibrary) © (Bing United States)

Small waterfall in Hamersley Gorge, Karijini National Park, Australia (© Alessandra Sarti/Photolibrary) © (Bing United States)

Two hyacinth macaws in a tree, the Pantanal wetland, Brazil (© Roy Toft/Getty Images) © (Bing United States)

Aerial view of Ambergris Caye, Belize (© Michael Melford/Getty Images) © (Bing United States)

Imagine mosaic, part of the Strawberry Fields memorial in Central Park, New York City (© Ocean/Corbis) © (Bing United States)

Vehicle traveling through a tea plantation in Kerala, southern India (© Hugh Sitton/Corbis) © (Bing United States)

Autumn in Grand Teton National Park (© Carol Polich/Lonely Planet Images) © (Bing United States)

A visitor near giant sequoias in Yosemite National Park, California (© Frans Lanting /Danita Delimont) © (Bing United States)

Midnight sun on the North Cape, Norway (© SIME/estock) © (Bing United States)

Mythical creatures guarding the golden chedi at the Grand Palace, Bangkok, Thailand (© David Davis/Photolibrary) © (Bing United States)

Black-backed jackal pups (© Jami Tarris/Corbis) © (Bing United States)

Covered bridge near Bradley, Maine (© A. J. Whitney/Getty Images) © (Bing United States)

Honey jars (© Leser, Nicolas/Corbis) © (Bing United States)

View from Haleakalā, Maui, Hawaii (© SuperStock/Getty Images) © (Bing United States)