A journey to Valhalla, Oregon’s hidden canyon
Clip: 02/04/2016 | 3m 53s
Few places on this planet have gone unexplored. Just 60 miles from Portland, Oregon, there's a natural wonder that was first spotted in 2010. Last summer, an expedition team navigated for three days to reach their goal: Valhalla Canyon. Oregon Public Broadcasting chronicles that effort in a new documentary.
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