On their first visit to Berlin a group of young Irish tourists decide to check out the East Side Gallery. They travel to where tourist maps tell them the gallery is and spend the next hour wandering along what appears to be a busy highway flanked by a graffiti-covered wall. "Where's this so-called gallery?" they curse, before giving up and heading back into the center of Berlin for more productive sightseeing.
There's some embarrassment later on when they find out that the big concrete wall they were walking alongside is actually one of the most important monuments of the 20th century, symbol of the Cold War and global shorthand for, firstly, political oppression and then, peaceful revolution. Yes, the Berlin Wall.
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