ANSWER: Luxembourg
Explanation:
- Schengen is a small wine-making village and commune in far south-eastern Luxembourg, near the tripoint where the borders of Germany, France, and Luxembourg meet.
- “Schengen agreement", which came into effect in 1995, eliminated border checks among its members and allowed foreign visitors to travel throughout the area using one visa.
- Schengen is now a core part of EU law.Only six of the 28 EU member states are outside the Schengen zone - Bulgaria, Croatia, Cyprus, Ireland, Romania and the UK.