April 14 2012

Australia, Canada, China, Germany, France, United Kingdom

An aerial view of the House of the Doves, Yucatán, Mexico

(© Kenneth Garrett/National Geographic/Getty Images)

 New Zealand

Ohrid lake and Kaneo Cathedral, Ohrid, Macedonia,

(© Jon Arnold Images/Masterfile)

New Zealand, United States

Creek flowing through rocks in the Porcupine Mountains, Ontonagon County, Michigan, US

(© Ron Strong/Superstock)