camouflaged underground bunker of the oscarsborg fortress, historic ww2 site in norway

bak blooming bunker camouflage camouflaged conceal copy county defense disguise dracedil europe flower fortress grass green growing growth hide hill hillside historic islands kaholmen landscape narrow nature norway norwayn oscarsborg plant scandinavia scenery scenic season site sound space summer sunlight sunny tourism travel underground vacation viken war weather white wildflower world ww2