Quebec City or Ottawa
Next year I (from the UK) go to Canada as part of a 2 week work trip which me and my friends are turning into a holiday. In the very early stages of planning at the moment, however we already know we're going to be staying in Niagara for 2 days, 4 in Toronto and 4 in Montreal. This leaves us with 2 days unfilled in which we could either go to Quebec City or Ottawa.
None of us (all in mid-20's) are particularly interested in going out drinking/partying etc so not sure which destination makes more sense. QC seems to have more history but idk if I just haven't researched what's in Ottawa well enough?