Possible Clues:

• Cold War dividing line until 1989
• *Concrete barrier erected in the 1960s
• Carriage with everybody arriving at city boundary
• City division set up grassed area, one ringed by lines about Brandenburg's opening
• Cold War barrier
• Site of a memorable 1989 impromptu performance by 50-Across
• From book, will learn about a symbol of the cold war
• Students' wine bar set up in post-war city
• Deutschland divider, once