Selecting sites of national significance within Quebec is a difficult endeavour. There is no denying how many events in Canada's formative history took place inside of Quebec's borders but on whose terms are those events to be recounted? The enscription on a plaque can be an incredibly contentious issue if the wording is perceived to be even slightly incorrect by any group's criteria. It is also problematic that an enscription is permanent and will be perceived in different lights based on the prevailing feelings of any one particular time period. Lastly, you don't make plaques and memorials to people who are looked at unanimously with disdain; you make them to heroes. Thus there is a certain amount of glorifying inherent in any of these which is basically unavoidable and can skew the historical truth in the pursuit of fostering a national unity.
It is interesting to look at the selection process by the Canadian Department of Heritage for choosing national historic sites. According to the website, "the subject under consideration will have had a nationally significant impact on Canadian history." This really begs the question, who in Quebec has been nationally significant in terms of their impact on Canada? The obvious choices are those who worked to unify the province with the rest of Canada and thus being of positive "national significance." But those who sought independence for Quebec, both in the distant and near past, are of equal importance. Are they equally represented as "nationally significant" people by the department of Heritage? No. And this.....is a problem.
Lachine National Historic Site
The Lachine Canal is located in Montreal; it was opened to shipping in 1825. It was the canal network, which lined the heart of the country with the Atlantic Ocean. Thousands of ships used this route before it was closed in 1970 due to the opening of the St. Lawrence Seaway. Since it’s closing in 1970 the area has been used by millions of cycling and walking by. This is a site, which has strong ties to the past and helped to make not only Quebec but also, the country what it is today.
Artillery Park has played an important role in defending Quebec since the 17th Century. It overlooks the plateau went of the city and the St. Charles river, both areas that could have been vulnerable to attack. It was recognized as a historic site in 1959.
The Sir-George-Étienne-Cartier National Historic Site of Canada in Montreal is in place to "commemorate the life and accomplishments of one of the Fathers of Confederation." But these two adjoining homes do not deal with the how contentious a figure Cartier is in French Canada. While he is legitimated by many because of his encouragement of commerical progress and English-French raprochement, others disagree. Many in Quebec see him as "an opponent of the more genuine and purer strain of French-Canadian nationalism emanating from the rebellion period and passing from Papineau to the Parti Rouge down to the separatists of our own day." Despite being a national memorial in Canada, this second story is not told.

Other Interesting Historic Sites:
Battle of Chateauguay
Sir Wilfred Laurier National Historic Site
Fortifications of Quebec National Historic Site
Levis Forts National Historic Site