Truly unique courses are hard to come by, but I'd mention Kenora, a Stanley Thompson/Robert Moote in Ontario. It is genuinely unique and I've yet to find anything remotely similar from Stan.
Dinosaur Trail in Alberta is absolutely unique, but perhaps not in a good way.
I had never heard of either of these. Had I known about Dinosaur Trail, I surely would have visited when I was in Alberta a few years ago for The Confidential Guide. What's unique about Kenora though? Their web site doesn't make it obvious.
Dinosaur Trail is one of the weirdest golf courses in the country. The original 9 hole front nine is pretty awful, while the back nine plays through the Badlands and is insane. It's unique for sure. You'd never forget it.
As for Kenora, the use of bedrock and the Canadian Shield makes it really interesting, and actually provides some interesting contours. I've attached some photos below. In your guide, Tom, this would be one that you'd need someone to show you around. The contours are so extreme that there's a handful of blind holes, but it's a cool golf course. Riley Johns really likes it, if I remember correctly.
4th hole approach:
Par 5, 8th fairway. The green is tucked in a valley beyond the hillside.
Par 4, 9th tee shot. Uphill, blind dogleg right:
Looking back at the 9th. The hole goes up and then back down to the green. I can't decide if it's a good or bad hole, but it's one I'll never forget.
The approach to the par 4, 11th, with some bedrock showing:
Ian Andrew had also mentioned to me that Braeside in Montreal is unique. I had asked him what's a course that embodied the principals of The Old Course in Canada, and the only one he could think of is Braeside, so that's pretty interesting.