The Canadian Cave and Karst Information Server Recreation, Outdoors, Speleology, Directories - The Canadian Cave and Karst Information Server. Links to Web sites relating to caving in Canada. http://www.cancaver.ca/
Cavernet Recreation, Outdoors, Speleology, Directories - Cavernet. Worldwide caving links from USA based Bill Bailey. https://www.caver.net/
Karst Worlds Breaking news, technical articles, product reviews and trip reports of our caving, climbing, mountaineering and hiking trips. http://www.karstworlds.com