On my most recent trip to Berlin, I ran across an interesting art installation in the Magdalenenstraße U station. It consists of 20 murals created by East Berlin/DDR artist Wolfgang Frankenstein and is titled "Geschichte in 20 Bildern" (History in 20 Pictures). The murals were placed on the walls on either side of the station's platforms by the DDR government in 1986 as part of preparations for the celebration of Berlin's 750th birthday. While the quality of the expressionist murals is subjective, it's pretty interesting to see what a DDR artist envisions as the big 20 moments in history (which, of course, is limited to the struggle of the proletariat). Titles of murals are only in German, so a little knowledge of German (or a translation/dictionary app) is helpful.
I found the installation only because I noticed a work by Frankenstein in the conference room of the old Stasi Headquarters (now the Stasi Museum) that portrayed East German soldiers building the Berlin Wall while other soldiers smiled and played with East German children. Happily, there was some information on the artist in an electronic display that also mentioned the art installation, which happens to be in the U station that is closest to the Stasi Museum.
It's "art in situ," as Rick calls it -- art in the location where it was meant to be consumed. For me, it was a great find!