When in Berlin, we went to visit the Holocaust memorial. It was very eerie. From the outside all the blocks seem about 3 or 4 ft high. However when you walk in you realise that the centre is significantly lower, and are suddenly surrounded by 15ft tall pillars. Your insitinct is to stay towards the middle, and with the tight passage ways it can seem very constricting, which I suppose, is the point of the whole exercise.