has part has quality cave FTT:443 FTT:445 grotto FTT:1071 cavern https://en.wikipedia.org/wiki/Cave TGN:21485 SWEETRealm:Cave TGN:21486 FTT:446 FTT:447 notch Naturally formed, subterranean open area or chamber. Geonames:S.CAVE cave wall cave floor surface landform closure incomplete