successful

Inspired by @TheMann and his ideas for making Mexico a more prosperous land. Let's see how Mexico and other Latin American countries could be made into at least rapidly developing nations.

Simple question. What is/are your favorite colonial ventures from otl that didn't succeed in the long run? Bonus points if you can convince someone to do a timeline about them being successful. My favorite is France Antarctique in Rio de Janeiro, which existed between 1555 and 1567, and had...