Cheese and sausages. Do you need another reason? Stop off for some beer and wine for later too. I recommend coming here on your way out as well so you have some delicious souvenirs to take back home.
Although you are on the Saint Lawrence Seaway, there is not a lot going on right on the water. It is actually very industrial looking and not very appealing. Seems like they could do so much here if they wanted.
But lots of things to visit around the area. As I visited it at summer Time, I Still recommend it. Isn't it this change between seasons that is so amazone.
If you don't make it over to the Orleans island (which would be a terrible shame) stop into the market. Some of the items available from the agro-tourism locations on the island can be found here. My favourites were the ciders.
The colors of fall were absolutely stunning against the water. Took a long, wonderful stroll along the water and enjoyed the views. There are lots of picture opportunities and the science museum as well.
The Old Port really is old Quebec. The streets are a little less busy, the buildings perfectly preserved, the views of the river are excellent. There are great restaurants, antique shops and artist workshops here. It's a must visit.