March 12-20, 2013 there was a tour on Sweden Coastal artillery of Cold War era organized by Lars A. Hansson (www.bunkertours.se, see: tour's page). All tour's sunjects are on the map.
I went from St.Petersburg to Helsinki by night bus and spent a day by walking on ice to some Cveaborg Fortress islands and then gone to Stokholm by night ferryboat where my adventures begun.
There is a preliminary photoreport about the event: