WW1 trench shelter room and machine gun position

First World War trench shelter room and machine gun position in base XXIII:4 in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in Kannelmäki, Helsinki, Finland. The base was built in 1915 - 1918. This site has been cleared and cleaned recently. The whole base contains: * 6 machine gun positions * 7 firing and observations positions * 9 shelter rooms. 4 intact, others collapsed or unfinished * 130 meters of trench More info: * [Location in Google Maps](https://goo.gl/maps/KmD1Rw1QC6ZtWyQm6) * [Wikipedia: Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) * [John Lagerstedt , Markku Saari: Krepost Sveaborg](http://www.novision.fi/viapori/eavaus.htm) * [Finnish Heritage Agency site info](https://www.kyppi.fi/to.aspx?id=112.1000013836) (only in finnish)