#cave  an underground enclosure with access from the surface of the ground or from the sea
  supertype:  #natural_enclosure__naturalenclosure__enclosure  a naturally enclosed space
  part:  #floor.Earth's_surface  #stalactite  #stalagmite  #wall.geological_formation
  subtype:  #cavern  a large cave or a large chamber in a cave
     subtype:  #Carlsbad_Caverns  a group of caverns in southeastern New Mexico noted for their stalactites and stalagmites
  subtype:  #cove.cave  small or narrow cave in the side of a cliff or mountain
  subtype:  #grotto__grot  a small cave (usually with attractive features)
  subtype:  #Lascaux  a cave in southwestern France that contains Paleolithic paintings

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