In May of 2001, 20th Century Fox, was preparing to release its summer blockbuster, “Planet of the Apes.” They wanted a publicity stunt, and saw that computer geeks everywhere seemed to be flocking to this new hobby, Geocaching. To try and capatalize on this potential market, Fox Studios formulated a “sub-plot” that had absolutely nothing to do with the movie: Renegade humans were trying to reveal an “Alternative Primate Evolution” theory by placing artifacts around the world. Code Name: Project A.P.E. (From geocaching.com)
This will not be as difficult to get to, and you won't have to fly to Brazil.