Road to Survival Ends in a Cliffhanger–Literally

Civilization has a tendency to cling to the water. This means following a river or stream is usually an excellent way to find your way out of the wilderness. In this case, Matt Graham and Joe Teti find that their watery highway ends at the top of an 80 ft. waterfall. How can they get around this obstacle? | For more Dual Survival, visit http://dsc.discovery.com/tv-shows/dual-survival#mkcpgn=ytdsc1

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