Introduction to Quebec's Star-shaped Castle Fortress: Quebec's Star-shaped Castle Fortress is located on Cape Diamant. It is the most famous fortress on the North American continent and has always been considered a strategic location in Canada. The Star-shaped Fortress was built by the French army in 1783, with a total length of about 4.6 kilometers. It was once called the "Gibraltar of North America" ​​and is still the headquarters of the 22nd Company of the French-speaking Army in Canada. If you come here in the summer, you can watch the garrison review and the traditional ceremony of changing of the guard.