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Largest of nine meteor craters at Kaali, island of Saarema, Estonia: photo by Siim Ansaar, 2005

Waymarked boardwalk trail through the sand dunes of Ynyslas in Ceredigion, Wales: photo by Badgernet, 2008

Marsh Bride Brook and Coastal Salt Marsh, East Lyme, Connecticut: photo by Alex756, 2003
Savanna in Burkina Faso, near the Gbomblora department, on the road from Gaoua to Batié: photo by Stefan Dressler, 2009

Village of Kostenets, Bulgaria: photo by Cassini83, 2006

A thunderstorm with heavy precipitation over Fogg Dam Conservation Reserve in the lower Adelaide River catchment, Northern Territory, Australia: photo by Bidgee, 2007
Longsheng rice terrace, Longsheng County, Guilin, China: photo by Anna Frodesiak, 2009

Looking toward Torres del Paine, Chile ("The blue colour-cast is real, it's just the colour of the light down there") : photo by Winky, 2005

The four summits of Mount Aragats, Armenia: photo by Bouarf, 2007

Landscape of Samaipata, two hours from Santa Cruz de la Sierra, Bolivia: photo by Natalia Rivera, 2007

Reprovesi National Park, Kouvola, southeastern Finland. in midnight sun: photo by M. Passinen, 2006

Levittown, Pennsylvania, aerial view: photographer unknown, 1959 (National Archives and Records Administration)

Lake Assai, Djibouti, the most saline body of water on Earth, with 34.8% salt concentration: photo by Fishercd, 2007

Mountain, sky, light and shadow at Howard's Pass, Yukon Territory, near North West Territory, Nahanni National Park, Canada: photo by Jo Ohara, 2006

Vegetation on the Argentinian side of the border between the Argentinian province of Catamarca and the Atacama region of Chile, after passing the Paso de San Francisco: photo by Eric Depagne, 2005

Arenal, an active andesitic volcano in Northern Costa Rica, 90 km. northwest of San José, erupting: photo by Matthew
Landry, 2006

Fedchenko Glacier, Pamir Mountains, Tajikstan: photo by Georgy Salnikov, 2008