Cahermore (Cathair Mhor) is a fine almost circular stone fort situated in Ballyallaban guarding the pass down to the Ballyvaughan valley. The interior of the fort measures around 170 ft across and the walls are from 8ft to 9 ft thick in places. The fort was built during the medieval period between 500 AD to 1100 AD as a defended farmstead. The gateway which is a mortar-built turret has a large lintel some 6 1/2 ft long and 5ft wide is not original and may have been built during the 15th century.
There is a later built outer wall circling the inner fort measuring about 400ft across, the outer and inner walls were subdivided by smaller walls and these areas were most likely used as animal stockades.
Watch for a stone stile on a bend in the road where there is limited parking. The cache is a PET preform container.