Inside this fortified shipping container, eager students at Niagara College are learning the ins and outs of cannabis production, earning Canada's first commercial graduate certificate in growing pot.
(SOUNDBITE) (ENGLISH) CARSON OTTO, STUDENT IN NIAGARA COLLEGE'S COMMERCIAL CANNABIS PRODUCTION PROGRAM SAYING: "It's amazing.
I'm learning a ton." They, along with millions of other Canadians, have been preparing for today, when Canada becomes the first industrialized nation to legalize recreational cannabis.
Its approach will be cautious and regulated, starting with limited stores and products, including no edibles for a year, and tight control over supply In fact - some of the nation's biggest cities, including Toronto and Vancouver, won't have any legal stores open on the big day.
Others, including Montreal, will have only a handful.
Still, it's a huge milestone and fulfills a campaign promise by Justin Trudeau's Liberal government, as it will redirect billions in illegal sales from organized crime back to the government.
The anticipation of this day had already catapulted the country's fledging marijuana producers into the big leagues with valuations in the billions.
Countries around the globe will be watching Canada's rollout closely.
One issue likely to spring up: how to deal with with American tourists, since the U.S. still has a federal ban on the stuff.
Signs at the Ottawa International Airport now politely reminding travelers that what you smoke in Canada stays in Canada.