In that AI defense, there’s nothing to visit/do in Ottawa except a bunch of museums and canal/river visit, and even that not recommended to swim due to Ecoli, so I would struggle too to list 10 attraction points or similar.
I had a book on Ontario ghost towns, so while working a gig in Ottawa, I went to one of them. It wasn't so much a ghost town as it was a bend in the road with a forest and a field, and no hint that it was ever anything besides that.
You can always drive slowly past CFB Lietrim and admire the scenes from ECHELON / Five Eyes spy programs. There was a time that base officially did not exist, and those giant white golf balls were "laundry facilities." So there is that.