National Geographic’s ‘Adventure of the Year’ ice climbs world’s most powerful waterfall… Niagara Falls. In the midst of Winter with -10 C ( 14 F) Will Gadd and girlfriend/ climber, Sarah Heuniken climbs 156 meters, which is just over 508 feet. Read more about this amazing climb that had people viewing Niagara Falls from around the world this week in the news. Read more…