Bounded by Queen St, Front St, Yonge St. and Avenue Rd. TTC: King, Union, or St. Andrew Stations

Dozens of towering glass, concrete and steel monoliths are a must-see for architecture enthusiasts. Toronto's Financial District is actually quite compact and walkable, even in inclement weather. That's because of the "underground city" - 27 kms (16 miles) of interconnecting passageways under the streets that feature more than 1,200 retail stores and services. Street entrances to the subterranean walkway are indicated with "PATH" signage.