How I came to write First Descent

Did you catch my interview of how I came to write First Descent? Here's the link:
http://www.pamwithers.com/#interview
The river photo was taken in Ecuador not far south of Colombia, where my novel is set. I was there doing research for First Descent. The photo of the necklace is one I found on the Internet, printed out and kept near me as I wrote about the necklace that my character Rex is so superstitious about.