Have You Seen These Amazing Extreme Summer Adventures Photos?

National Geographic online has put up a series of wonderful - and amazing - extreme adventure photos. Rock climbing on a mind-bending wall, plunging over a waterfall in a kayak, and surfing a 16-foot-high wave are just some of the extreme activities.  Have you had any of the adventures in these images?

One photos shows a base jumper in Norway. To learn more about more these birdmen, as they have been called because they jump off cliffs and fly through the air at speeds up to 140 miles an hour, visit "Would you leap off a cliff or a bridge?" and click on the link to the CBS 60 Minutes segment on "Taking Flight with Birdmen."