Schengen visa has absolutely aided in the growth of the number of visitants to Europe. The Schengen (Schengen pronunciation - Shen-ghen) is the world’s largest free travel area. Covering most of Europe, the Schengen allows passport-free travel between all nations that are within the zone thanks to the Schengen agreement. Schengen visa is a short term entry permit that admits people to travel to any of the members of the Schengen zone and stay there for a maximum of 90 days in a half-year period.