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Iron Age 800 BC - AD 43

‘Fogou’ is a Cornish word meaning a cave, and Cornish fogous are prehistoric underground passages constructed by excavating a trench and lining its sides with either large stone blocks or drystone walling, and then roofing this passage with large flat slabs.

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Fogous are often found in association with later Iron Age or Romano-British period settlements, but modern investigations have done little to solve the enigma of their function – they may be ritual structures, or have been used for storage or as a place of refuge.

Examples to visit


Sited close to the Helford river, Halliggye is a good example of a large well preserved Cornish fogou and is found within the earthworks of an associated contemporary Iron Age farming hamlet or Round.

Read about Halliggye