The Schengen Zone, often referred to as the Schengen Area, is a group of 26 European countries that have officially abolished all passport and other types of border control at their mutual borders. This allows for the seamless movement of people within the Schengen Zone, similar to domestic travel. The Schengen Zone is known for its free movement policy, which aims to promote the freedom of movement within Europe for both EU and non-EU citizens.