Nov 11, 2025 #Finland #Helsinki #UndergroundCity
Helsinki hides a vast underground city built as a bomb shelter after World War II. Today, the

Nov 11, 2025 #Finland #Helsinki #UndergroundCity
Helsinki hides a vast underground city built as a bomb shelter after World War II. Today, the massive network is not idle – residents use it for everyday leisure activities, from gyms to cafes. But with Finland sharing a border with Russia, the underground city’s original purpose as a protective shelter remains relevant.

Al Jazeera’s Hashem Ahelbarra reports from Helsinki.