Introduction to Fort Henry: Fort Henry (Fort Henry) was built on the hill next to the Royal Military Academy. It occupies the commanding heights of Kingston and guards Lake Ontario, the St. Lawrence River and the Rideau Canal. Its strategic location is extremely important. To this day, the area where Fort Henry and the Military Academy are located is still a military base of the Canadian Department of Defense. There are various performances and interactive programs for visitors every day in the castle, and soldiers and staff are dressed in nineteenth-century costumes.