Answer:
It is the only city in North America that is fortified
Explanation:
Quebec is the only city in North America that is still fortified.
The walls were put up by the British as a protection of the city and they stayed against the invasions of the Americans. The walls still exist, giving the city a unique and European look, along with cobblestone streets and old houses and buildings.
Today, the fortification and the walls are protected by UNESCO and proclaimed World Heritage Site in 1985.
