| California Underground Online Exhibits | | An overview of the formation of caves, cave conservation, photography and wildlife together with local educational resources. Diagrams, pictures and slide shows. |
| Ozcavers Mailing List | | Aiming to get cavers communicating with each other on a regular basis about all matters caving. |
| Speleolabs | | Apres-cave lifestyle enhancement. Pictures, chat, news, a different outlook on the sport of caving. |
| Speleomania | | Includes caving discussion forums, news, views and resources. |
| The Caving Pages | | An introduction to caving, cave types and conservation together with links to many caves and organisations around the world. |
| The Virtual Cave | | A wide-ranging introduction to the geology of caves. Organised by geological feature with pictures and clickable virtual maps. |
| U.S. Cavers Forum | | Features multiple cave discussion boards pertaining to cave gear, trips, photography, news, the NSS and conservation. |
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