The St. Lawernce Sea way, has tons of nice old buildings..
If you google Fort Wellignton Prescott Ontario.. It will bring up info.. on the war of 1812, where, they actually sent the people away on boats to Austrila (Sorry) but a neat piece of history..
Then if you travel the number #2 highway, you will see all our old buildings ect.
Also when you get here, go to one of our tourist places. (They give out, a book with free coupons to everyone in Ontario ) i get one every year

They will give you maps, look up info/prices for you.
I would play it by ear, if you don't want to go to all the touristy spots..
When are you coming? Are you traveling with kids, or just you, or other adults.. Did you want to camp? stay in B & B or hotels? Rent a car and go
I can look into more info for you
