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.
   http://www.museumca.org/caves/onli_realm.html

Cave and Karst Terminology
   An extensive glossary of speleological terms from the Australian Speleological Federation.
   http://home.mira.net/~gnb/caving/papers/jj-cakt.html

Caves and Caving in the UK
   Information on the main caving regions, advice for the beginner and experienced caver together with links to organisations.
   http://www.sat.dundee.ac.uk/~arb/speleo.html

Caving.Org.UK
   Advice, information and links for UK-based cavers and mine explorers. Gear, clubs, weather, news, weil's disease.
   http://www.caving.org.uk/

Caving.UK
   Essential information for the UK caver. Weather forecast, clubs, advice, accommodation, diary of events, find a caver.
   http://www.caving.uk.com/

Ozcavers Mailing List
   Aiming to get cavers communicating with each other on a regular basis about all matters caving.
   http://wasg.iinet.net.au/ozcavers.html

Speleolabs
   Apres-cave lifestyle enhancement. Pictures, chat, news, a different outlook on the sport of caving.
   http://www.speleolabs.co.uk

Speleomania
   Includes caving discussion forums, news, views and resources.
   http://www.speleomania.com

The Caving Pages
   An introduction to caving, cave types and conservation together with links to many caves and organisations around the world.
   http://www.cavesource.com

The Weil's Disease Information Center
   Advice for the caving and medical community on Leptospira Bacterium including symptoms and treatment.
   http://www.leptospirosis.org/