French Guiana is one of the few places where you can actually do this. This takes place on a beautiful island near Cayenne, where scientists left many of those squirrel monkeys for research. They are not at all afraid of humans and will look for the food in your bag...

You can view more of the island on that video : http://www.dailymotion.com/user/aldric_dussourt/video/x8q...

http://mangrove.over-blog.org (less info)