Self-Guided excursion - Underground Helsinki
Helsinki may be the only city in the world that has an underground master plan. Construction of the vast underground network began in the 1980s and continues to this day. Helsinki now has almost 10 million square metres of underground spaces and tunnels that conceal a subterranean art museum, church, swimming hall, shops and even a karting track inside a civil defence shelter. A 40-metre-deep reservoir is also located beneath the city centre.
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