stable with an octagonal base from 1776 stalla a base ottagonale del 1776 in the swiss alps and in area of the mountain gotthard

1776 abandoned airolo alps architecture area army atomic base basement building bunker bunkers canton cellar concrete construction corridor creepy defense defensive del demolished destroyed empty europe fort fortification fortress gate gotthard gotthardpass hidden historic history house landmark landscape massive military mountain nature octagonal old ottagonale outdoor pass protection rock scenic secret security shelter stable stalla stone storage stronghold structure swiss switzerland tessin ticino travel tunnel underground wall war