The Schengen Area is the area comprising 26 European countries that have abolished passport and any other type of border control at their common borders, also referred to as internal borders. It mostly functions as a single country for international travel purposes, with a common visa policy. The Area is named after the Schengen Agreement. Countries in the Schengen Area have eliminated border controls with the other Schengen members and strengthened border controls with non-Schengen states.