|Address:||La Ville Souterraine, Tel: +1-, Fax: +1-,|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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Montreal's Underground City is the largest underground complex in the world. The tunnels extend over 32km spread over an area of twelve square kilometers. 60 residential and commercial complexes comprise 3.6km² of floor space. 80% of all office space and 35% of all commercial space in downtown Montreal is located underground.