NSS discussion forum for US cavers including sections for cave diving, news, conservation, equipment, photography, rescue and surveying.

An overview of the formation of caves, cave conservation, photography and wildlife together with local educational resources. Diagrams, pictures and slide shows.

Events around the world.

Discussion forums including caving, the NSS, the study of speleology, cave conservation and management, bats and gear.

Photographs and articles dealing with speleology and cave exploration.

A wide-ranging introduction to the geology of caves. Organised by geological feature with pictures and clickable virtual maps.

A list of long and deep caves from all around the world. Listed by depth, length and country.

Articles on the terminology, techniques and gear used for caving. Discussion boards, editable information, feedback and links.