WW1 shelter, Vallikallio, Espoo, Finland

First World War trench shelter room in base XXVIII:9 in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in Vallikallio, Espoo, Finland. The base was built in 1915 - 1918. The whole base contains: * 2 machine gun positions * 2 observations positions * 5 shelter rooms, 2 with roof, 3 collapsed * 45 meters of trench More info: * [Location in Google Maps](https://goo.gl/maps/LgUmRo8KXUUUyyux7) * [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=112.1000007752) (only in finnish)