Inside the fort are various things of note. Above is the base side of a sing gate (top of photo). To the left are two barracks blocks which are very similar to modern barracks soldiers use.
In the lower and center of the photo are the different kind of wagons the Romans used at this time. These could be four wheeled or two wheeled. Some are almost like houses on wheels.
To the extreme right is the head quarters of the fort’s commander. This is called the Praetorium.