Path Connections
Bay-Adelaide: Partially connected now, you can access the parking area from inside the Bay store.
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Bay Store: I've been through at 10pm on a Sunday night. Are you sure they locked it before 2am? My understanding is they can't legally cut off any part of the path during subway hours. When I was in there they just had little retail gates that closed around the merchandise.
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Hospital District: All the major hospitals are already connected underground. Mt. Sinai, Sick Kids, TGH, at any rate, and I think Princess Marg. as well.
But the tunnels aren't really up to 'Path' standards they are currently, in most cases for staff and patients (in transport) only.
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Connection from Atrium to College Park.
Delta Chelsea is obvious as point one, but I've never been below their ground level, is it usable now? Or is it just parking?
The missing link is the World's Biggest Bookstore site.
Its an eyesore anyways, time for it to go.
Then maybe Chapters will get off their ass and building the REAL world's biggest bookstore (which last I checked is Barnes & Noble in New York with 450,000 titles, (3x what WBB carries)