 Corpses may have been placed in nearby caves until they decomposed, when the bones were moved to the tomb.The Llethryd Tooth Cave, or Tooth Hole cave, is an Early Bronze Age ossuary site in a limestone cave, about north, northwest of the Parc Cwm long cairn cromlech, on private land along the "Parc le Breos Cwm" valley, near the village of Llethryd.The cave was rediscovered by cavers in 1961, who found human bones.