The site of the Roman fort in Caerphilly is easy to find  being bounded by Crescent Road to the west, Nantgarw Road to the north, and by North Lake and the castle defences to the east. However most of the fort is inaccessible – either behind the The Grove, Cadw Site, or within a private house. The area of the southwest wall is accessible – but almost nothing is discernible.  However you are also wandering around the rear grounds of Caerphilly Castle – so it is still pleasant.