National Geographic Photo Contest 2011 - In Focus - The Climbing the Harding Ice-field trail in the rain, has its rewards. I stopped to admire glacier, only to find an adult black bear eating in front of a glowing blue glacier.
Explore the ancient caves of Hang Son Doong, Vietnam. Hang Son Doong is one of the largest caves in the world and features a fast-flowing underground river. For spelunkers, exploring Hang Son Doong is the equivalent of scaling Mount Everest.