An underground, or partially buried, curved chamber, of unknown function, mostly made of stone.
French for tunnel. Generally on a canal dug through the summit of a pass in order to prevent excessive climbing.
An underground chamber or passage of unknown function found only in Scotland, Ireland, Cornwall and Brittany. In Cornwall they are known as fogous.
Archaeological feature - underground chamber or passageway
or subterranean. Literally; under earth. An underground chamber, room or series of rooms dug into the ground or bedrock under a fort or other work, to hold supplies, ordnance stores or provisions in a secure and temperate location.
Souterrain (from French 'sous terrain', meaning 'under ground') is a name given by archaeologists to a type of underground structure associated with the Atlantic Iron Age. Regional names include earth houses, fogous and Pictish houses and they appear to have been brought northwards from Gaul during the late Iron age.