Stari Most bridge over the Neretva river in Mostar, Bosnia and Herzegovina (©Gavin Hellier/Corbis)(Bing Australia)

Aerial view, wheat field stubble burn, Kansas (© Harald Sund/Getty Images)(Bing Australia)

Glacier-fed lake, South Island, New Zealand (© picturegarden/Getty Images)(Bing Australia)

Farquar Lake in Apple Valley, Minnesota (© Justin Heglund/Getty Images)(Bing Australia)

Sculpted boxwoods at the Château de Marqueyssac in Vézac, France (© Peet Simard/Corbis)(Bing Australia)

View of eroded cliffs from Zabriskie Point, Death Valley National Park, California (© Dennis Frates /Alamy)(Bing Australia)

Male ruff in breeding plumage, Norway (© Werner Bollmann/age fotostock)(Bing Australia)

Palm trees growing on the Savanna, Madagascar (© Frans Lanting/Corbis)(Bing Australia)

American black bear cubs in Jasper National Park, Alberta, Canada (© Don Johnston/All Canada Photos/Corbis)(Bing Australia)

Coombra sand dunes, Head of Bight, Eyre Peninsula, Australia (© Benedetta Rusconi/4Corners)(Bing Australia)

Tentacles of Roundleaved Sundew (© Klaus Honal/Superstock)(Bing Australia)

Temple bells and chimes, Chiang Mai, Thailand (© WIN-Initiative/Getty Images)(Bing Australia)

Central Park, Manhattan, New York City, New York (© Jon Arnold/Corbis)(Bing Australia)

Shrub and flower design in Vrtba Garden (Old Palace garden) in Little Quarter in Prague, Czech Republic (© William Manning/Corbis)(Bing Australia)

Mini rock pools on beach near Carisbrook Falls Reserve (© Mark Parkes /Getty Images)(Bing Australia)

Visitors descending the spiral stairs of the Vatican Museums, Vatican City (© Getty Images)(Bing Australia)

Western lowland gorilla female in a cloud of butterflies (© Anup Shah/Corbis)(Bing Australia)

Oia at sunset on Thíra (Santoríni), Greece (© John C. House/Getty Images)(Bing Australia)

The Milky Way stretches over the Quiver Tree Forest, Namibia (© Florian Breuer/ NASA)(Bing Australia)

Swimming Pacific pink scallop (© Marty Snyderman/Corbis)(Bing Australia)

Composite image of Earth at night from space (© Robert Simmon/ NASA)(Bing Australia)

Upper Antelope Canyon in the Navajo Nation near Page, Arizona (© Roy Zipstein/ 360cities.net)(Bing Australia)

Alishan National Scenic Area, Chiayi County, Taiwan (© Kyle Lin/Getty Images)(Bing Australia)

Hall of Memory, Australian War Memorial in Canberra (© Tom Harradine/ Alamy)(Bing Australia)

Gifford Pinchot National Forest, Washington (© Art Wolfe/Getty Images)(Bing Australia)

Detail of a steam turbine in an electricity-generating power plant (© Monty Rakusen/Aurora Photos)(Bing Australia)

Baltimore skyline and Inner Harbor, Maryland (© Greg Pease/Getty Images)(Bing Australia)

Butterflies from Kaeng Krachan National Park, Thailand (© Getty Images)(Bing Australia)

Preservation Hall, French Quarter, New Orleans, Louisiana (© Cosmo Condina/Superstock)(Bing Australia)

Milky Way above Crater Lake, Oregon (© Nagesh Mahadev)(Bing Australia)