This raised circular platform, measuring roughly 16 metres north to south and 13 metres east to west, occupies a naturally strategic position where steep slopes drop some 10 metres down to the river below. The defensive earthwork features a flat-bottomed fosse, essentially a dry moat, that’s between 4.7 and 6 metres wide at the top and approximately 1.4 to 1.6 metres deep, with an external bank about 3 metres wide running along its southeastern, western and northeastern edges.

The monument’s location appears to have been carefully chosen, with the River Sow providing natural protection at distances varying from 20 metres to the north and 80 to 90 metres to the south and northwest. Unfortunately, farm buildings have damaged the eastern side of the structure over time, though the remaining earthworks still clearly demonstrate its defensive purpose. The platform itself is now overgrown but retains its distinctive subcircular shape at the western end of the natural promontory.

Historical research suggests this may be more than just a simple defensive earthwork; it’s been identified as a possible ringwork castle and potentially served as the caput, or principal seat, for the Roche grant of Fernegenel. Intriguingly, another ringwork known as Toberfinnick sits just 100 metres away on the opposite bank of the River Sow, suggesting this area held particular strategic importance in medieval times. The proximity of these two fortifications hints at a broader defensive network that once controlled this stretch of the river valley.