The system known today as the Saxon shore forts was a Roman defensive system for the coast of what later became East Anglia. Not much is known about the full extent of the fortifications, and even less remains. However, one of the few remaining stations is what is known as Burgh Castle, possibly identified as Gariannorum.
Firstly, one must keep in mind that the East Anglian shoreline has changed considerably in the last few thousand years. Great river deltas have disappeared, to be replaced by new ones further south or north. This has happened both in present North Norfolk as well as at the River Yare. The Burgh Castle area is one of the affected zones, with a former site of a very good port having been replaced by an intertidal zone less suitable for marine traffic.
Indeed, it is possible that the present Caister-on-Sea was located on an island, connected to other local stations (Burgh Castle and Reedham) by the water. Venta Icenorum (Caister St Edmund) was a great port by the same influence, with the river there being considerably deeper and wider than it is now. The site at Caister St Edmund is similarly interesting, though the Burgh Castle one is perhaps more reminiscent of the past glory with the ruins being considerably better preserved.
The fact that approaching the site, all that one sees are the walls, still standing strong after 1600 years, is enough to create a impression. Of course, later fortifications have also been positioned there, with the Normans building a castle of their one as well as monastic efforts by the early Christians. The Norman ruins, however, have not sailed through the time as well as the Roman stonework.
Overall, then, what a place: the sheer accessibility and scale of these ruins makes one want to visit, even if the site itself is relatively empty of plaques and explanations. The missing information, however, allows for imagination. What was here before? Who was here before? Can your mind’s eye picture the ships about to dock at the wall that is no longer there? Is a turma riding out for a patrol of neighbouring region?
Any of these things could have happened, any of these will have happened at some point in the past. And it is up to us to imagine life here as it was then.