UNDERGROUND SPACE Crossword Clue
UNDERGROUND SPACE Crossword Clue
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                    Crossword Puzzle Infos
                            
                                The term 'underground space' can be summarized as a subterranean area or cavity, such as a cave or CAVERN. A CAVERN is a large, naturally occurring underground space, often formed by the dissolution of soluble rocks such as limestone. Caverns are often used for recreational activities such as caving and spelunking, as well as for storage and other purposes.