This day consisted of going to the DDR museum, then a guided tour to various historical places in East Germany, and finally the Jewish Museum.
The DDR Museum was a very interactive museum about the everyday life of someone living in East Germany.
On the guided tour I took, we went to a ghost station that had an exhibit on ghost stations. When Berlin was split, one transportation headquarters was in the West and another was in the East. It was easy to split most of the lines to provide transportation for each side. There were a few train lines that could not be so easily divided. The East were in control of these lines and had the West pay them to use them. Then then blocked off the stations that were in East Germany so there would be no escaping through the tunnels. These 'ghost' stations would also be guarded by soldiers. After the fall of the wall, the stations were put back into use.
What the station looked like all bricked up
Next was the Jewish Museum by Daniel Libeskind