August 16 2012

France

Dune of Pilat,Gironde,Aquitaine,France

(© Doug Pearson/Corbis)

Japan

Fringed Orchid (Sagiso)

(© Tetsuya Tanooka/a.collectionRF/gettyimages)

Australia, Canada, Germany, United Kingdom

Sandboarders hiking up dunes for another ride,Great Sand Dunes National Park,Colorado,US

(© Glenn Oakley/Aurora Photos)

New Zealand, United States

Close-up of a Melon

(© Corbis)

 China

Rustic Black River covered bridge near South Haven,Michigan,US

(© Tara Vorhes/Getty Images)

April 16 2010

Canada, United States, New Zealand, China

Seagulls on a Sandbank in Bassin d'Arcachon,Gironde,France
Jean-Daniel Sudres/Corbis ©

United Kingdom, Australia, Japan, Germany

Spotted Cuscus on a tree in Tufi,Oro Province,Papua New Guinea
Michele Westmorland/Getty Images ©

April 10 2010

Australia, Japan

Churches of Botiza,Romania
Peter Adams/Corbis ©

United Kingdom

Seagulls on a Sandbank in Bassin d'Arcachon,Gironde,France
Jean-Daniel Sudres/Corbis ©

Canada, New Zealand, Germany

Cinnamon Fern, Detail of Emerging Fronds,Lively,Ontario,Canada
Don Johnston/age fotostock ©

China

Fakarava Atoll,Tuamotu Archipelago,French Polynesia,France
Sergio Pitamitz/Corbis ©

United States

Boldt Castle,Thousand Islands,The Saint Lawrence River,New York,US 
Richard T. Nowitz/Corbis ©