Here's a novelty: at just two metres above sea level, the lowest hillfort in Britain.
If you're in the area, I recommend you go and take a look. You wont see massive earthworks, but you will find well-defined banks and ditches within the flat, Fenland landscape.
Drive along the B1093 between Wimblington and Manea and you'll see a signpost pointing down a farm track, passing Stitches Farm, to Stonea Camp.
There are information boards to read scattered amongst the defences as you wonder if Boudicca walked on this site 2,000 years ago.