WW1 shelter room and observation position

First World War trench shelter room and observation position (type C) in base XXVIII:8 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. More info: * [Location in Google Maps](https://goo.gl/maps/qUTMxKcYTpQXRxwT7) * [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=112.1000007751) (only in finnish)