Aerial view of Gardens by the Bay and the Super Trees, Singapore City, Singapore (© SIME/eStock Photo)(Bing Australia)

Lattice architectural detail in the concourse at King‘s Cross train station, London, England (© Think James Photo/Gallery Stock)(Bing Australia)

Mercury (© NASA)(Bing Australia)

Close-up of a blue agave plant (© Don Paulson Photography/Superstock)(Bing Australia)

Highland cattle in a field of heather on the Isle of Skye, Scotland (© Frank Krahmer/Corbis)(Bing Australia)

Telescopes at the Roque de los Muchachos Observatory on La Palma in the Canary Islands, Spain (© Getty Images)(Bing Australia)

Tadpoles in Cedar Lake, near Campbell River on Vancouver Island, British Columbia (© Eiko Jones Photography)(Bing Australia)

Detail of a steam engine at Steamtown National Historic Site, Scranton, Pennsylvania (© Ian Shive/Aurora Photos)(Bing Australia)

Pelicans in flight, near Bandon, Oregon (© Cindy Kassab/Corbis)(Bing Australia)

Polar bear mother and cubs near Hudson Bay, Canada (© Kennan Ward/Corbis)(Bing Australia)

Anhumas Abyss cave near Bonito, Mato Grosso do Sul, Brazil (© Marcio Cabral/360cities.net)(Bing Australia)

Cloud Gate sculpture by Anish Kapoor, Millennium Park, Chicago, Illinois (© Kjel Larsen)(Bing Australia)

Boats moored in the Vieux-Port, Cannes, France (© Alan Copson/age fotostock)(Bing Australia)

Aerial view of the Great Barrier Reef, Queensland, Australia (© Grant Faint/Getty Images)(Bing Australia)

A lake in Jotunheimen National Park, Norway (© Sylvestre Popinet/Christel Freidel/Minden Pictures)(Bing Australia)

Wedge Pond and Mt. Kidd, Peter Lougheed Provincial Park, Alberta, Canada (© Darwin Wiggett /Getty Images)(Bing Australia)

Notre-Dame Cathedral Basilica of Ottawa, Ontario, Canada (© Kevin O´Hara/age fotostock)(Bing Australia)

Workers in terraced rice fields, Bali, Indonesia (© Denis Waugh/Getty Images)(Bing Australia)

Bloom of moon jellyfish swimming at night in Prince William Sound, Alaska (© Hiroya Minakuchi/Minden Pictures)(Bing Australia)

City of Jaén in Andalucia, Spain (© Rolf Hicker Photography/Alamy)(Bing Australia)

Green sea turtle being cleaned by reef fish off the Kona Coast, Big Island, Hawaii (© Masa Ushioda/Aurora Photos)(Bing Australia)

Brooklyn Bridge and Manhattan skyline, New York City, New York (© Robert Harding World Imagery/Alamy)(Bing Australia)

Ounianga Serir Lakes in northern Chad (© George Steinmetz/Corbis)(Bing Australia)

Singapore’s business district (© Albert Rene Ibanez)(Bing Australia)

Hang Son Doong, Phong Nha Ke Bang National Park, Vietnam (© Carsten Peter/Getty Images)(Bing Australia)

Aerial view of glacial ice on the River Thjorsa (Þjórsá) in southern Iceland (© David Yarrow Photography/Getty Images)(Bing Australia)

The Mount Everest Base Camp at Khumbu, Nepal (© Kent Harvey/Tandem Stock)(Bing Australia)

A flame goby guards her eggs in the Kaafu Atoll of the Maldives (© Jason Isley/Scubazoo)(Bing Australia)

Lake Wolfgangsee and the town of St. Wolfgang in Salzkammergut, Austria (© GT Image/Getty Images)(Bing Australia)

A river in Kakadu National Park, Australia (© Yann Arthus-Bertrand/Corbis)(Bing Australia)