Roundhouses are buildings used by railway companies to enable efficient maintenance work to be carried out on their locomotives and rolling stock. They are in essence a large circular building with railway tracks entering all around the circumference like the spokes of a wheel. Once the locomotive has been driven inside it can be worked on and then sent out again on any of the other lines. One of the first roundhouses ever to be built was actually in Derby in England and it would appear that the design was so good little has ever had to be changed since.
The Pankow-Heinersdorf Roundhouse and the other buildings which make up this railway maintenance site are situated in the north of Berlin and was part of the GDR (East German) railway maintenance infrastructure. We wandered on to the site with Will Swain during July 2013 and had a reasonably interesting hour or so, but to be perfectly honest, industrial sites are not really our bag, and there is a limit to just how many photographs you can take of a building like this before you become incredibly bored!
So... for what it's worth here are some of the photos we took.