What makes Berlin so attractive to us? Kay and I are city people, and when I ask myself why, I am reminded of what Dr. Samuel Johnson said centuries ago about his own city of London: “When a man is tired of London, he is tired of life; for there is in London all that life can afford.” If I replace “man” with “man or woman” and “London” with the names of the any of the world’s renowned cities, I have answered my own question. Great cities appeal to us because of their great variety. To “great” I’ll add “surprising.”