I used the "Parenteesi Suunnistuskartalle" database from Lynx and coming home from work, stopped at bunker location in Sarvvik.
Not much to be explored, really. A fenced 5x5m area, with concrete covering what holes they may have been earlier. Outside the fenced area, a rectangular depression leading to the fenced area. Most likely, this was the entrance tunnel which has been destroyed.
Just outside the fence, there was a wall still visible in the ground, and in the depression... there might be some opening to explore, although it is perhaps unlikely. Too much vegetation, not the right clothes for exploration, and being alone, I didn't want to push it.
The place is near the roundabout between Sarvvikintie and Sarvvikin Puistotie, and near Tulikukkakuja. Coordinates: N 60.15354417 E 24.60185852.
Photos (c) 2017 by Jari Arkko. All rights reserved.