May 06 2012

Australia, Canada, China, Germany, France

Keyhole Arch in Monument Rocks National Natural Area, Kansas, US

(© Charles Gurche /Danita Delimont)

United Kingdom

Full moon over the Sonoran Desert in Saguaro National Park, Arizona, US

(© Buddy Mays/Corbis)

New Zealand, United States

Buildings lining a street in Prague, Czech Republic

(© Reed Kaestner/Corbis)

Japan

Redwood trees in Redwood National Park, California, US

(© William Manning/Corbis)