WW1 trench, Pajamäki, Helsinki, Finland

First World War trench in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in base XXXV:11 Pajamäki, Helsinki, Finland. The base was built in 1915 - 1918. There is also a later WW2 anti-aircraft battery that is build partly over the WW1 trench. More info: * [Location in Google Maps](https://goo.gl/maps/GJAsiJHpRudiVmzu8) * [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: WW1 fortress](https://www.kyppi.fi/to.aspx?id=112.1000013727) (only in finnish) * [Finnish Heritage Agency site info: WW2 anti-aircraft battery](https://www.kyppi.fi/to.aspx?id=112.1000030675) (only in finnish)