Padlocks, affixed to a bridge by sweethearts, in Bastejkalns Park, Riga, Latvia -- Guiziou Franck/photolibrary © (Bing Australia)

Trail in the Columbia River Gorge National Scenic Area, Oregon -- Craig Tuttle/Corbis © (Bing Australia)

Baby seal lying on ice -- MIXA Co. Ltd./Photolibrary © (Bing Australia)

Guanabara Bay from the summit of Sugarloaf Mountain, Rio de Janeiro, Brazil -- SIME / eStock Photo © (Bing Australia)

National Coach Museum in Lisbon, Portugal -- Jose Fuste Raga/Corbis © (Bing Australia)

Orchid mantis (Hymenopus coronatus) -- Francesco Tomasinelli/Visuals Unlimited, Inc. © (Bing Australia)

Jellyfish -- SSC/SuperStock © (Bing Australia)

Lago Nero with view of Gruppo di Brenta - a portion of the Alps, located in the Province of Trento, Italy -- SIME / eStock Photo © (Bing Australia)

The Dom Luis I bridge and city of Porto, Portugal, at sunset -- SIME/eStock Photo © (Bing Australia)

Stately live oaks in Magnolia Plantation and Gardens, Charleston, S.C. -- Adam Jones/Visuals Unlimited, Inc. © (Bing Australia)

Belmont Harbor in Chicago, Ill. -- Bill Ross/Photolibrary © (Bing Australia)

Wallaby adult with young in snow, Tasmania, Australia -- Shin Yoshino/Minden Pictures/Getty Images © (Bing Australia)

Winter sunrise over the beach at Roker Pier in Sunderland --Roger Coulam/Photolibrary © (Bing Australia)

Flat crepe mushrooms (Crepidotus applanatus) -- Dick Poe/Visuals Unlimited, Inc. © (Bing Australia)

Modern Art Museum in Fort Worth, Tx. -- Wes Thompson/Corbis © (Bing Australia)

Kolgrima River delta, Iceland -- Hans Strand/Corbis © (Bing Australia)

Deepwater mushroom soft coral (Anthomastus ritteri) off the coast of California, in the Pacific Ocean -- Mark Conlin/Photolibrary © (Bing Australia)

Thor’s Well, on the Oregon coast -- Chris Mullins © (Bing Australia)

Sunset over the Pacific from the International Space Station -- NASA - digital version copyright/Science Faction/Corbis © (Bing Australia)

Mature & young Musk-ox bulls and cows in a defensive lineup during winter on the Seward Peninsula near Nome, Alaska -- Milo Burcharm/Photolibrary © (Bing Australia)

Young black-tailed prairie dogs (Cynomys ludovicianus), Montana -- Beth Davidow/Visuals Unlimited, Inc. © (Bing Australia)

Plant beds in Chesapeake, Va. -- Cameron Davidson/Corbis © (Bing Australia)

Red rock crabs (Grapsus grapsus), Galapagos Islands, Ecuador -- Gary Cralle/Getty Images © (Bing Australia)

The open-air theater of Lykavittos Hill in Athens, Greece -- George Tsafos/Lonely Planet Images © (Bing Australia)

Aerial view of Yerba Buena and Treasure islands, Oakland Bay Bridge, and San Francisco, California -- Marli Miller/ Visuals Unlimited, Inc. © (Bing Australia)

Meandering river near Cook Inlet, Anchorage, Alaska -- Patrick J. Endres/Visuals Unlimited, Inc. © (Bing Australia)

Elliott Key harbor in Biscayne National Park, Homestead, Florida -- Rapsodia/SuperStock © (Bing Australia)

Trees overgrown with moss, Hoh Rain Forest in Olympic National Park, Washington -- imagebroker rf/photolibrary © (Bing Australia)

Sunrise at a lake near Wawa, Ontario, Canada -- Wayne Simpson/Corbis © (Bing Australia)