Sightseeing in Berlin

We managed some sightseeing, mostly concentrating on the Wall. The East Side Gallery consists of a long stretch of wall with graffiti, some of which are definitely works of art. In other places the location of the Wall is marked with iron poles and this division of the City gave rise to many sad stories of families being split up.
We admired many buildings from outside (Reichstag, as you need to apply to visit a week in advance and go through strict security even then) and a few museums from the inside. Perhaps the City was a little more drab than I had imagined but there is a lot of building going on. Of course it was special to see the Brandenburg Gate and near there was monument to the Jews that perished. 2,800 concrete blocks and a metre square with a metre between then, creating a sort of maze that you can wander about in. The blocks vary smoothly in height, giving a wave effect. Looking at this array you can picture that many people. If all those people were on one block and each block was covered in the same way, then that is how many were exterminated.
Nothing is hidden, the atrocities are there for all to see but is the world remembering and acting accordingly?