Why Finland Built An Underground City

Why Finland Built An Underground City Beneath the capital of Finland lies a massive network of bunkers and tunnels spread out all across the city. It’s so vast, that it can fit about 150% of Helsinkis entire population. You may be asking yourself why something like this is even needed, but if you zoom out of Helsinki, it’ll become obvious why. This is the story of why Finland has built a large underground network, and what's inside.