Travel not advised by Department of States
USA today had some good articles about traveling and kidnappings. If you go to this link, you can pull up the world map and its highlighted on the risk areas.
I doubt that a map with risk factors will keep me out of Mexico, or the Philippines, however, no way I venture into middle africa. That place is a hotbed of lots of bad things merging together all at once, and as a foreigner walking around the streets of Lagos Nigeria, in the middle of some civil unrest, Boko Haram running rampant blowing apart churches with people in them and IED's around a church corner,.....I don't think so.
Not giving those guys in that part of the world a chance to try to kill me AGAIN!!!
The State Department warns Americans not to travel to certain zones