The fort is believed to have been occupied for some 300 years up to and including the 1st century BC.

The hill includes twin summits and the defences divide into three systems. Excavations in the 1930s demonstrated at least four phases to the defences.

The northernmost defence is a single bank and ditch of 1.5ha. The southern area is defended by a single bank and ditch on the steeper southern and western sides and on the east by triple defences. Linking the two is a single bank and ditch. The total area enclosed is some 4ha.

You can still see some evidence of occupation today - within the southern enclosure, some eight house platforms can still be seen.

Most of the buildings were circular, though one D-shaped building was excavated in the 1930s.

The ridged top site is enclosed by a series of banks and ditches.There have been numerous finds on the site and most are now in the hands of the National Museum of Wales. They include a clay pot made in the Malvern Hills and a pale yellow glass bead, possibly made in Somerset, as well as decorated Iron Age pottery, a 4th century Roman coin, spindle whorls and loom weights.

The northern enclosure is farmed privately and is not open to visitors, though it can be viewed from the southern summit. The Wellington Monument, raised in 1852, stands within.

Directions: Take the A487 south from Aberystwyth, across bridge and through Trefechan. Just beyond Trefechan, take right hand turn marked No Through Road. Follow road 0.8km and park in the pull-in just beyond the gate on the left, signed public footpath. Take the track up to the summit, heading for the Wellington Monument.