Stairs to First World War trench in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in base XVIII:2 Paloheinä, Helsinki, Finland. The base was built in 1915 - 1918. These stairs are also featured in [separate bigger model](https://skfb.ly/6RqIu) of the base.
The whole base XVIII:2 contains:
* 10 firing positions
* 4 shelter rooms (all collapsed)
* at least 100 meters of trench
More info:
* [Location in Google Maps](https://goo.gl/maps/pNvP8BafL12QK4277)
* [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=112.1000013727) (only in finnish)