Are you asking whether people could go around to get from East Berlin into West Berlin (no: the barriers encircled West Berlin), or whether they could go around to get from East Germany into West Germany (not really: the inner German border was another barrier). I'm guessing the latter; here are a few earlier posts:

• What physically separated East and West Germany? - includes links to a couple more

• Why did people try to defect over the wall in Berlin and not through some unguarded part of the huge border between East and West Germany?

• Why did people risk their lives trying to escape from Eastern to Western part of Germany through the highly protected Berlin Wall instead of going somewhere south or north where I suppose it would be much easier to escape?

• In East Germany, how easy would it have been to get a boat and sail to Denmark or Sweden and defect?

• Did any Eastern Germans escape the DDR over the Baltic sea instead of the iron curtain? If no, why not?

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