IKK "Stalin's Line" is a very interesting place that is worth a visit. Only there you can see live the original and replicas of the BTT of the Second World War, a modern exposition, shoot from a chilled weapon and taste a wonderful soldier's porridge for "frontline" 100 grams. I also recommend trying the hodgepodge at the VDV bar.
One of the preserved command and observation posts of the defense line, located on the territory of the historical and cultural complex "Stalin Line", excellent preservation. There are monuments of technology nearby. I recommend to inspect it.
Unfortunately, the observation post is closed and it cannot be visited, and there is not much to see outside, so it remains to wait for it to be put in order.