Well, here goes nothing. This one is about is 3 years in the making, with a lot more focus now.
I must give thanks for Pedantique and Hercules Rockefeller for putting up with my questions and kicking my ass into actually (trying to) tell a story. Thanks also to Countless Skies (recently) and Eskobar (way back) for critique in the forums, and PMEase-G4 for help with brainstorming. Sorry if I didn't integrate everyone's ideas, but I appreciate them all.
The image is modified from this 1598 map of South America, recovered from Wikimedia commons at that link, which is in the public domain.
If the image size is an issue, I may need to change the image box formatting, I'm just slightly loathe to.