world map poster on the wall

I'd love to have a large world map for my wall. Unfortunately, borders seem to be redrawn so often, it quickly becomes obsolete if countries and their names are shown. A clear plastic overlay with the changed name and changed borders on it that could be removed and replaced when changes are made. I can remember when Zimbabwe was Rhodesia, and when Tanzania were Tanganyika and Zanziba. And this was just in Africa!