The physical archaeological evidence for Iron Age religious practice is more reliably informative, though it requires interpretation.

Sacred springs and water deposits — locations where exceptional quantities of votive offerings were deposited — are documented across Iron Age Britain and Europe.

The specific types of objects deposited, and the specific locations selected for deposition, reflect patterns that suggest consistent beliefs about which entities could be communicated with through these offerings and which locations served as effective points of contact.

Human remains in Iron Age contexts — including the skull deposits in rivers, the human bones in settlement deposits, and the complex multi-stage burials documented at sites across Britain — all contribute to a picture of religious practice in which the boundary between the living and the dead was more permeable than most modern Western frameworks would suggest, and in which specific dead individuals could occupy roles within the community that continued after their physical death.