>> water inside the boat. look, look, look. the boat is sinking. ♪ >> you got to go down and then up, just right! we make it to the other side, reasonably dry. beer? the maranon canyon is home to a wide range of species including and most interesting to us a strain of the cacao previously thought to be almost extinct. a few years ago, the valley's cacao trees were dna tested at a u.s. lab and had dna of the rarest form of cacao in the world. this stuff.