European Cross-Border Travel
Nine more countries have joined the European Schengen Agreement, which essentially eliminates border controls between participating countries. Currently, the countries in Europe which participate in Schengen are Belgium, France, Germany, Luxembourg, Monaco, Netherlands, Portugal, Spain, Italy, Austria, Greece, Denmark, Finland, Iceland, Norway, Sweden, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, and Slovenia. (The last nine listed have implemented the land border agreement, but will not implement the agreement for airport arrivals until March 29, 2008.)
Blue areas on this map have implemented Schengen, green areas are set to do so within the next several years. (Image courtesy of Wikipedia.)