A very important Iron Age site, Llyn Cerrig Bach has been the source of the largest hoard of Iron Age objects yet to be discovered in Wales. The amazing collection was found during World War II during the construction of an RAF Valley airfield when workmen recovered over 150 bronze and iron objects from the peat which had formed in a former lake.

The hoard includes iron swords, shield fragments, spears, horsegear, a bronze plaque, iron chariot wheels, fragments of cauldron and two iron gang chains (many of these items can be seen in the National Museum of Wales in Cardiff today). It is believed that these valuable objects were thrown into the lake as offerings to the tribal goddess.

A small quantity of animal bones collected by the workmen may indicate additional sacrifices. The Iron Age practice of sacrificing high value items, as well as animals and humans, involved significant ritual. Some of the metal objects had been deliberately damaged. The iron swords were bent, thus making it impossible for them ever to be used again.

The finds have been dated between 2nd century BC and AD 60 which suggests that the lake's importance as a place to offer sacrifices to the gods developed in the later half of the Iron Age. We do not know why this lake was chosen but archaeologists have speculated that perhaps an important event took place here which gave the site its significance. Could this event have occurred on the eve of the Roman attack on Llyn Cerrig Bach?

Its also believed that Llyn Cerrig Bach was a major centre of ritual activity. The Roman historian Tacitus described Mona (Anglesey) as a centre of druidical power and even described the sacred oak groves of the island. Discoveries similar to Llyn Cerrig Bach have been made on the continent and are evidence of a pattern of ritual activity which was widespread in Iron Age times. In visiting the site today all that remains of the lake is a small expanse of water. A plaque stands at the site to identify the discoveries.

Directions

Now on RAF ground. Take the A5 to Caergeiliog. At western end of village, turn left at Toll House. After crossing the railway bridge, take the next left towards RAF Valley airfield. The site is marked by a large boulder.