The photos I took just looked like a buried foundation but this is a reproduction of how it would have looked 2000 years ago.
A few things amazed us when we got down into the excavation.
The first was the height of the rooms. At 5 feet 8 inches I am not a tall person but I had to stoop to walk through the rooms. When we asked one of the officials he told us that, not only would the Romans have been able to stand upright but they would have been able to do it with their helmets on.
The other thing we were told was that this particular fort had central heating. Spaces under the floors and between the walls allowed hot air to circulate throughout the buildings.
In 1958 none of us had central heating in our homes 2000 years after this fort was built.