My summary is hardly a glowing endorsement, but you could certainly do a lot worse than watching "Caxambu!". While the story is a bit familiar and the budget apparently rather low, it worked well enough that after it was over, I was glad I'd seen it--even with its shortcomings.
John Ireland plays the leader of a gang who steal a bag of diamonds in South America. They take a diamond cutter and his wife hostage and steal a plane in order to escape. However, the plane crashes and the group is stranded in the middle of a VERY hostile wilderness. The main problem are the local natives--who pick off several in the group, one-by-one. The other problem is greed, and the thieves soon start bickering with each other.
I've seen several films and TV shows that remind me of "Caxambu!" but despite being familiar and having some difficult to believe characters (particularly Ireland and his unbelievable change of heart), it kept me engaged throughout and was a decent little film. The location shoot didn't hurt.