There are swift-flowing rivers which dash through jagged canons; and there are enormous plains, which in winter are white with snow, and in summer are gray with the saline alkali dust.
See one of the world's most awe-inspiring displays of the power of nature- from the sky, from the foaming river below, or even from within arm's reach.
Indigenous rights groups say they're probably trying to intimidate the tribe so they don't block access to the river areas where they prospect for gold.