I suppose there are many things you could say about Canada but if I could only pick one word to characterize it that word would be big. (Pretty too).
It is one freakin' big hunk of land. Try making your way across it – from Newfoundland, through the other Maritime provinces (be sure to stop in Prince Edward Island – great beaches), into Quebec, then Ontario … aren't we done yet?
No. There's Manitoba. Saskatchewan. Alberta. That's where you hit the bump in the road known as the Rockies and find yourself in British Columbia.
Let's say you do all that. You've still only gone right to left. You haven't done up and down yet. Not only is there "the North" (Yukon, NWT and Nunavut), each province has a north and south – and it's pretty significant. Just try walking from Fort MacLeod, Alberta to Fort McMurray. See how much leather is still on your shoes.
In terms of size, it appears Canada is 9,976,140 km2. And this wiki says, "Canada is the second largest country by area in the world (after Russia) and the largest in North America."
So. Big place. Don't get lost!
(And all of the above is a roundabout way of saying that even those people who think they've seen Canada, haven't seen Canada. No matter how long they've lived here.)