This underground site at Sancreed, Cornwall dates from the Iron Age also. It is at the centre of a group of four courtyard houses. The stone houses would have been built in about 100BC to replace earlier wooden ones.
Unusually it has a circular chamber as an addition to its 66ft passageway.
This beehive chamber was over 6ft high and sealed over, the only entrance being a tiny hole.
Early man would have had to dig a huge, deep ditch, wall the sides and then cover it with large slabs of rock.
42ft of the tunnel still remains although it is now open at both ends.