Llyn Cerrig Bach

This small lake, found just to the north of RAF Valley may have been an important site for ritualistic sacrifices made by the Iron Age inhabitants of Anglesey. While RAF Valley was being constructed during WWII the workmen uncovered in the peat at the former lake edge, the largest hoard (approximately 150 pieces) of Iron Age objects found in Wales. The hoard is now in the national Museum of Wales in Cardiff, and contains valuable items such as swords, spear heads, pieces of shields, chariot wheels, a bronze crescent shaped plaque, horse bridles, iron bars, a trumpet, gang chains (large handcuffs for the feet) black smiths tongs, a sickle and pieces of cauldron.

The finds have been dated and estimated to be from between 300 BC and 100 AD; it is thought that they were thrown into the lake, sometimes deliberately damaged, as offerings to some God or Goddess important to the tribes. The Roman historian Tacitus recorded that Mona (Anglesey) was the centre of Druidical learning during the Roman conquest. Druids are thought to have been the religious leaders (the priestly class) of the Celtic Iron Age.