Do many other cities have underground pedestrian walkways to the same extent as Toronto?
https://pathmap.ca/The PATH is a mostly underground pedestrian walkway network in downtown Toronto that spans more than 30 kilometres of restaurants, shopping, services and entertainment.
The walkway facilitates pedestrian linkages to public transit, accommodating more than 200,000 business-day commuters as well as tourists and residents.
It's a premium feature of downtown life, especially in bad weather and winter.