The Giants of Kerzerho are an alignment of dolmens, the tallest of which measure six meters in height and weigh 40 tonnes. They are aligned perpendicular to the Kerzehro Alignments, located a little further south.
Only a graceful ceiling slab on three supporting stones has survived from the dolmen. Two more slabs are visible in the remains of the mound, on the ground.
The Devil's Rock is in no way a megalith dating from the Neolithic, but a natural granite outcrop which overlooks the Blavet. The views of the watercourse are particularly beautiful.