ahhhhhhhh, Prince Edward County.
One of my favourite places in the world. hamburger used to take us there almost every weekend when I was a little kid - and Setanta and I went there as part of my vacation last September.
It's south of Belleville (Ontario), in the Bay of Quinte, on the Loyalist Parkway (Highway 33), which runs over to Kingston - including a gorgeous free ferry ride.
Black River makes fabulous cheddars - one of the last independent dairies left in Ontario. The curds are fantastic there (the marble's good as well, though I might like Forfar better).
The area around Picton (the biggest town in Prince Edward County) used to be called the Cape Cod of Canada. I personally think it's much nicer in the Bay of Quinte.
a view from the Glenora ferry heading toward Prince Edward County
a look back at the ferry from Lake on the Mountain
looking from Little Bluffs Conservation Area toward the back side of the eastern end of Sandbanks Provincial Park (largest freshwater sand dune system in North America)
The fruit and veggies are extraordinary out there in season - it's becoming quite well known for its wineries and one place now makes really good hard cider.