caves
- Scope note
- Natural underground passageways or chambers, or hollowed out cavities in the side of a cliff. [USGS GNIS Feature Class Definitions http://mapping.usgs.gov/www/ti/GNIS/gnis_users_gui de_appendixc.html]
caves
Non-preferred terms
- UF↸ cave entrances
- UF↸ caverns
- UF↸ grottoes
- UF↸ natural tunnels
- UF↸ underground lakes
