A cavern is an underground chamber formed by erosion
erosion
A cave or cavern.
cavern
Sinkhole and a cavern
A cave or cavern.
cavern Answer #2: A sinkhole.cavern
TBH the adjective is superfluous by definition! 'Cavern' is usually applied to a very large, usually natural but sometimes artificial, subterranean chamber. Sometimes it is applied to an entire cave system, especially if part of it is opened up for tourists - e.g. Carlsbad Caverns, Kent's Cavern. It tends not to be used in formal speleological writing: it is a 'chamber' whether of 10m3 or 1000m3 volume.
its a subterranean chamber ; a subterranean chamber is a underground room used to confuse robbers
Sarawak Chamber is largest underground chamber in the world by area. It is in Borneo.
Underground Chamber was created on 2011-08-17.
A cave deposit formed by precipitation of calcium carbonate from groundwater entering an underground cavern which forms a hanging feature from the ceiling or wall of the cave.
The Sarawak Chamber is the largest known cave chamber in the world. The Sarawak Chamber is a cave that is located underground in the country of Malaysia.