Kiitos!

Oh, I just noticed this isn't closed for good, but that it's been under renovation since begging of June. The renovation is planned to end in September 3rd. https://www.k-ruoka.fi/kauppa/k-supermarket-kaisaniemi

But, how to revert this edit?

Joo, pieni viive siinä t toki uli. Itse aikanaan muutin vain tunnelin enkä ollut huomannut että tuo risteyskin oli muutettu jonkun muun toimesta.

Oh, sorry, I didn't realize the changes were so far from each other!
And the bunker comment is also relevant. I'm not quite sure what the structure there is, but some sort of a (weak) bunker was the best guess I could imagine.