Gary Bell/ Oceanwide / Surfer, Solitary Islands Marine Park, New South Wales, Australia

Yva Momatiuk & John Eastcott / Ice climbers atop Skaftafellsjokull Glacier, Skaftafell National Park, Iceland

Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland

Yva Momatiuk & John Eastcott / Tourist next to cascades, Dynjandi Waterfall, Westfjords, Iceland

Jeff Foott / The Citadel Ruins, Cedar Mesa area, Bears Ears National Monument, Utah

Colin Monteath / Climber near Pioneer Hut with Douglas Peak and Fox Glacier, Westland Tai Poutini National Park, New Zealand

Enrique Lopez-Tapia / Trango towers in fog, the world's tallest cliffs, Baltoro Glacier, Baltistan, part of the Gilgit-Baltistan territory, northern Pakistan. July 2007.

Pete Oxford / Buttress root in rainforest with photographer Pete Oxford standing beneath it, Sacha Lodge, Amazon Rain Forest, Ecuador

Suzi Eszterhas / Hot air balloon flying over wildebeest herd, Masai Mara Triangle, Kenya

Colin Monteath / Hiker looking at Mt Cook, known locally as Aoraki, from Malte-Brun, Southern Alps, New Zealand

Colin Monteath / Mt Sefton, climber at dawn above Mueller hut and cloud-filled Mueller Glacier, Mt Cook National Park, New Zealand

Bob Barbour / Surfer known as 'Wingnut, ' Costa Rica