Many airline cards have no foreign transaction fees, so can be a good choice to use while traveling abroad. (nerdwallet.com)
It is especially useful to the international traveler, and you even get your pick from a list of high end luxury cars for use while traveling. (creditflare.com)
I personally use these while traveling with my children, and I can tell you, you don't want to be without them while on the road. (pottytrainingconcepts.com)