Berlin teems with a lot of things — nightclubs, Turkish food, Communist architecture. For me, Berlin teemed with history. Every street seemed to hold information about the city’s often painful past. Much of this is conscious preservation in the form of public parks and landmarks, but there are a few subtle aspects of the city that speak volumes about, specifically, its 20th century history. The architecture changes when you move between the former West and East Berlins. In East Berlin, the buildings are pragmatic, functional, ugly in that classic Soviet style. The TV Tower, now the phallic symbol of all Berlin, was once a prominent expression of the power of…