This stone clad chamber is found in the middle of Carn Euny Iron Age settlement in Cornwall.
A fogou or fougou (pronounced "foo-goo") is an underground, dry-stone structure found on Iron Age or Romano-British defended settlement sites in Cornwall. Fogous have similarities with souterrains or earth-houses of northern Europe and particularly Scotland including the Orkney Islands. Fewer than 15 confirmed fogous have been found.
No-one is certain of the purpose of the Fogou.