Detail of the Velodrome at the London 2012 Olympic Park in Stratford, London, England (© Anthony Collins Cycling/Alamy) © (Bing Canada)

ExCeL Centre Phase 2 East Entrance in London, England (© Edmund Sumner/age fotostock) © (Bing Canada)

Boats leaving their stations at the start of a race at Eton Dorney, in London, England (© Rob Taylor/age fotostock) © (Bing Canada)

A golden snub-nosed monkey plays in a tree in the Qinling Mountains, Shaanxi province, China (© Ma Xiaobo Photography China/Corbis) © (Bing Canada)

Shooting complex at the Royal Artillery Barracks in London, England (© Ben Stansall/AFP/Getty Images) © (Bing Canada)

Dressage horse and rider (© imagebroker.net/SuperStock) © (Bing Canada)

The Olympic Stadium in Stratford, London, England (© Michael Steele/Getty Images) © (Bing Canada)

Aerial view of Hyde Park and the Serpentine Lake in London, England (© Andrew Holt/Getty Images) © (Bing Canada)

Three dabbling ducks with their heads in the water, Saxony, Germany (© S Meyers/Blickwinkel/age fotostock) © (Bing Canada)

A detail of the Basketball Arena at the Olympic Park in Stratford, London, England (© Bryn Lennon/Getty Images) © (Bing Canada)

Colourful seats in the Copper Box at the Olympic Park in Stratford, London, England (© Edmund Sumner/Corbis) © (Bing Canada)

The Basin in Franconia Notch State Park, New Hampshire, U.S.A. (© Danita Delimont/Getty Images) © (Bing Canada)

Sheikh Zayed Bridge at night in Abu Dhabi, United Arab Emirates (© spreephoto.de/Getty Images) © (Bing Canada)

Fritillary butterfly sitting on a blade of grass (© Clipcanvas) © (Bing Canada)

Close-up of a melon (© Corbis) © (Bing Canada)

Sandboarders hiking up dunes for another ride, Great Sand Dunes National Park, Colorado, U.S.A. (© Glenn Oakley/Aurora Photos) © (Bing Canada)

Aerial view of cultivated fields in Arizona, U.S.A. (© Jim Wark/Lonely Planet) © (Bing Canada)

Seaplanes docked in Seattle, Washington, U.S.A. (© John & Lisa Merrill/Danita Delimont) © (Bing Canada)

Wat Chai Wattanaram in Ayutthaya, Thailand (© SIME/eStock Photo) © (Bing Canada)

Ice fields at the summit of Mount Kilimanjaro, Tanzania (© Oleg Bulanyy) © (Bing Canada)

Sheep on Achill Island, County Mayo, Ireland (© Maura Molloy) © (Bing Canada)

Arrow crab on a sponge in the Caribbean Sea (© Jurgen Freund/Aurora Photos) © (Bing Canada)

Plitvice Lakes National Park, Croatia (© Clipcanvas) © (Bing Canada)

Aerial view of Piriápolis waterfront and promenade, Uruguay (© Bernardo Galmarini/Alamy) © (Bing Canada)

Rows of ice pops (© Flirt/Superstock) © (Bing Canada)

Murray River National Park in Australia (© Ignacio Palacios/Lonely Planet) © (Bing Canada)

Iron staircase of Currituck Beach Lighthouse, North Carolina, U.S.A. (© Peter Ptschelinzew/Lonely Planet) © (Bing Canada)

Combine harvester gathers the wheat crop, England (© Corbis Motion) © (Bing Canada)

Sailboats racing in the 2008 Acura Miami Grand Prix, Florida, U.S.A. (© Sharon Green/Corbis) © (Bing Canada)

Svartifoss waterfall flanked by hexagonal basalt columns in Vatnajökull National Park, Iceland (© Martin Moos/Lonely Planet Images) © (Bing Canada)