What is the inner space cavern formed?

The term "inner space cavern" typically refers to a subterranean void or chamber formed within rock formations, often resulting from geological processes such as erosion, dissolution, or volcanic activity. These caverns can be created by the action of water dissolving soluble rocks like limestone, leading to the development of extensive cave systems. They can also serve as habitats for unique ecosystems and are often explored for their geological features and mineral deposits.