To the right of the entrance are some chevaux de Frise (Frisian horses), which form part of the fort's defensive perimeter.
Along another part of the perimeter were these cannons and mortars. Through the openings in the wall, you can see U.S. 30.
I soon came to another entrance.
To the left in the above picture, behind the cheval de Frise, is a moat, which is seen in the next picture. In the left foreground is a wooden stake from the cheval de Frise.
After passing through the second entrance, I saw more artillery.
On one side of the yard was the quartermaster's building. Other buildings, such as barracks, had a similar appearance.
Also in this yard was a wagon.
In another area were all these vehicles.
Back near the visitor's center was the hospital, beside which were two ovens.
To learn more about Fort Ligonier, go here and here.