[balletomane]

Maybe this thread should've included the topic of cross-border regions provincially too. If the US has all these "emerging megaregions" I'm sure Canada has many too,
Vancouver/Seattle/Portland,
Calgary/Edmonton,
Saskatoon/Regina,
Quebec City-Windsor/Detroit corridor (with subregions),
Maritimes.
Winnipeg seems to be the only major Canadian city without a counterpart.