| National Speleological Society: The national caving organization of the USA, with links to all affiliated regions, grottos (clubs), sections, and special interest groups. |
| American Cave Conservation Association Inc.: Based in Horse Cave, Kentucky. Dedicated to preservation of karstlands. Includes membership application, volunteer projects, news, events and contacts. |
| Baltimore Grotto of the NSS: Founded in 1952 and dedicated to exploration, study and conservation. Includes calendar of events, contacts, membership information, photo album and projects. |
| Bear River Grotto: NSS affiliate is located in the Cache Valley area of Northeastern Utah and dedicated to study, conservation and safety through education and training. Includes trip reports, photos, a list of officers, and contact information. |
| Boston Grotto: Founded in 1952 to promote exploration, conservation, scientific studies and social activities. Includes contact information, trip calendar, newsletter, photo gallery and links. |
| Cascade Grotto Home Page: Based in Seattle, Washington. A chapter of the NSS dedicated to the study, exploration and conservation of caes and their contents. |
| Cave Conservation and Management Section of the National Speleological Society: Provides a central clearinghouse for research, expertise, and information. Offers a newsletter, membership benefits, the CCMS constitution, bylaws, minutes, and future events. |
| Cave Diving Section of the National Speleological Society: Promotes education, safety and conservation in underwater caves. |
| Cave Research Foundation: Institutional member of the NSS. Involved with conservation, research and karst interpretation. Includes operation areas, programs and projects, publications, and membership information. |
| Central Arizona Grotto Website: Promotes exploring, surveying, conservation, vertical work and safety techniques. Includes calendar of events, trip reports and contact information. |
| Central Connecticut Grotto: Located in Plainville and is a chapter of the NSS. Includes Constitution, activities schedule, photos, membership form and contact information. |
| Central New Jersey Grotto: Chartered in 1978 for exploration, conservation and study. Includes membership manual, monthly meeting notice, newsletters, photo galleries, store and links. |
| Central States Caving Society: Founded in 1998. Dedicated to safe exploration and conservation in lower-central Missouri and western Kentucky. Includes trip pictures and contact information. |
| Colorado Grotto: Located in Denver and affiliated with the National Speleological Society. Dedicated to exploration, study and conservation. Includes meeting information, events, projects, photo gallery and contacts. |
| Columbia Grotto of the National Speleological Society: Activities in Calaveras and Tuolumne counties in California. Dedicated to promote exploration, conservation, study and preservation of caves. Includes meeting information, trip reports, photos and contacts. |
| Commander Cody Caving Club: NSS grotto based in the Delaware Valley. Dedicated to exploration, study and conservation. Includes calendar of events, contacts, meeting and membership information, photo gallery and links. |
| Crescent City Cavers: Grotto of the NSS and located in Metairie, Louisiana. Dedicated to exploration and conservation. Includes Constitution, meeting schedule, membership form, calendar of events, photo gallery and contacts. |
| Dayton Underground Grotto: Formed in 1992 for cave exploration and conservation. Includes calendar of events, contacts, newsletter, photos, library holdings and message board. |
| Diablo Grotto: Located in the San Francisco Bay Area. Includes information about membership, meetings, trips, training sessions and projects. |
| District of Columbia Grotto of the National Speleological Society: Founded in 1939 and dedicated to exploration, study and conservation. Includes calendar of events, project list, safety and equipment tips, meeting, membership and contact information. |
| Flint River Grotto: Based in Tallahassee, Florida to promote cave exploration and conservation. Includes contact information, meeting and trip schedules. |
| Flittermouse Grotto of Western North Carolina: Located in Ashville and member of the National Speleological Society. Promotes conservation of caves, safety in their exploration and fellowship. Includes meeting and contact information. |
| Florida Speleological Society: Located in Gainesville and became a chapter of the NSS in 1956. Dedicated to exploration and conservation. Includes newsletter, trip reports, photos, meeting and contact information. |
| Gem State Grotto: Located in Boise, Idaho and affiliated with the National Speleological Society. Promotes exploration, study, conservation and restoration of caves. Includes schedule of events and contact information. |
| HR3 Home Page: An NSS affiliated survey team called HR cubed. Survey news, history, membership list, accomplishments. |
| Kansas Speleological Society: Formed in 1983 to catalog, study and explore caves. Affiliated with the NSS. Includes membership and meeting information, library resources and contacts. |
| Karst Waters Institute: Aiming to improve the fundamental understanding of karst water systems through sound scientific research and the education of professionals and the public. |
| Michigan Interlakes Grotto: Based in Union Lake and is a chapter of the National Speleological Society. Promotes exploration and conservation. Includes upcoming events, meeting and membership information, photos, store and contacts. |
| Michigan Karst Conservancy: Formed in 1983 and located in Ann Arbor. Aims to acquire, manage and protect unique geology and associated ecosystems. Includes details of projects and membership application. |
| Minnesota Speleological Survey: Affiliated with the National Speleological Society. Dedicated to study, exploration and conservation of caves. Includes information about projects, meetings, membership and contacts. |
| MIT Caving Club: Located on Massachusetts Institute of Technology campus. Offers trips during the school year. Includes schedule of events and contact information. |
| Mother Lode Grotto of the National Speleological Society: Located in Sacramento, California and devoted to exploration, study and preservation. Includes information about meetings, membership, equipment, conservation, MLG history and contacts. |
| Northeastern Regional Organization: Affiliated with the NSS and includes grottos in Pennsylvania, New York, New England and Eastern Canada. Includes newsletter, Constitution, meeting and contact information. |
| Northern Colorado Grotto: Located in Fort Collins and affiliated with the National Speleological Society. Includes events, newsletter, and contacts. |
| Northern New Jersey Grotto: Founded in 1952 and a chapter of the National Speleological Society. Contains contact information, meeting schedule, photos, upcoming trips and events. |
| NSS Communications and Electronics Section: Offers a forum for those cavers interested in cave radio and electronic gadgetry. Includes articles, newsletter, membership requirements and contact information. |
| NSS Human Sciences Section: Details the study of cavers and their interactions with each other and with caves. |
| NSS Medical Section: Medical and health related information and resources for cavers. |
| NSS Paleontology Section: National Speleological Society organization for cavers interested in the study of fossils featured. |
| NSS Survey and Cartography Section: Information on mapping and documenting caves, data management and archiving, and all forms of cave cartography. |
| NSS Vertical Section: Seeks to develop, educate, and train cavers in safe and efficient vertical rope techniques. |
| NSS Video Section: Offers help in using camcorders, lighting systems, editing setups, and computer technology in cave-related presentations. Includes newsletter, membership and meeting information. |
| Oregon Grotto of the Portland, OR / Vancouver, WA Area: Located in Vancouver, Washington and dedicated to the exploration and conservation of caves. Highlights photos, upcoming events, articles, a meeting schedule, and membership details. |
| Potomac Speleological Club: Based in the District of Columbia area. Formed in 1957 to explore, conserve and study caves. Includes trip reports, calendar of events, projects, photos, meeting and contact information. |
| Salt Lake Grotto: Your portal to organized caving in Utah. Site includes meeting info, trip reports, upcoming trips, cave maps, and the Utah long and deep cave list. |
| San Diego Grotto: Activities include exploration, surveying and conservation in California, Arizona, Nevada and New Mexico. Has meeting information, photos, maps and links. |
| San Francisco Bay Chapter National Speleological Society: Dedicated to exploration, study and conservation. Includes information about meetings, trips and events calendar, newsletter, projects, photos and contacts. |
| Sandia Grotto: Located in Albuquerque. Chapter of the NSS promotes study, conservation, safe exploration and fellowship. Includes Constitution, meeting and membership information, photos and contacts. |
| SERA Karst Task Force (SKTF): Resource organization dedicated to karst conservation and the clean up of karst features and caves, through the education of both the public and caving communities. Includes membership details. |
| Shasta Area Grotto of the NSS: Located in Northern California. Promotes conservation, study and preservation of caves. Features articles about safety, conservation, management, restoration and ethics. Includes photo galleries and contact information. |
| Silver Sage Grotto Home Page: Chapter of the National Speleological Society was founded in 2001 for exploration, conservation and survey of South Central Idaho caves. Includes Constitution and Bylaws, event schedule, meeting and contact information. |
| Sligo Grotto of the NSS: Based in Maryland and chapter since 1970. Dedicated to conservation, protection, exploration and surveying. No fixed meeting dates and locations. Includes newsletter, photo album, membership and contact information. |
| Southeastern Regional Association: SERA is an organization made up of the Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, and Tennessee NSS regions, USA. |
| Southern California Grotto: Meets in Pasadena. NSS chaper is dedicated to surveying and mapping, exploration, and conservation. Includes meeting and membership information, newsletter and contacts. |
| Southern Colorado Mountain Grotto (SoCoMoGro): Located in Colorado Springs and a member of the NSS. Dedicated to exploration, conservation and preservation. Includes meeting information, trip reports and contacts. |
| Southwestern Region of the NSS: Formed to further the discovery, exploration, scientific study and conservation of karst areas in New Mexico and Texas. Includes Constitution, upcoming events, newsletter and contacts. |
| Stonewall Cavers of the National Speleological Society: Section of the NSS for gay, lesbian and bisexual cavers. Includes contact information. |
| The Detroit Urban Grotto: Includes meeting and contact information, and membership roster. Features history, maps and survey statistics of the Fisher Ridge Cave System in Kentucky. |
| The Gangsta Mappers: Informal group throughout mid-Atlantic states devoted to cartography projects in Virginia and West Virginia. Includes summaries of current and past trips, photos and contact information. Password required to access websheets and schedule of events. |
| The Guano Page: Southern Nevada Grotto, Las Vegas, Nevada. Dedicated to the preservation and conservation of caves in Southern Nevada. Information on meetings and trips, photographs and maps. |
| Tri-State Speleological Society, Inc.: Chapter of the NSS and located in New Jersey. Promotes the exploration, conservation, and preservation. Includes membership and contact information. |
| Triangle Troglodytes: Located in Raleigh, North Carolina. Features trip and meeting schedules, newsletters, photo galleries and contact information. |
| Vermont Cavers Association: Based in Rutland and a chapter of the National Speleological Association. Dedicated to study and exploration. Includes Constitution and Bylaws, photos, meeting and contact information. |
| Wasatch Grotto: Chapter of the National Speleological Society meets in Bountiful, Utah. Includes meeting and trip schedules, membership list, photos and contacts. |
| West Michigan Grotto: Formed in 1999 this chapter of the NSS is dedicated to study, exploration and conservation. Includes a calendar of events, membership and contact information. |
| Willamette Valley Grotto: Greater Portland area and chapter of the NSS. Offers recreational and scientific trips, surveying and mapping. Includes Constitution and Bylaws, meeting and membership information, calendar of events, photos and contacts. |
| Wisconsin Speleological Society: Has chapters of the NSS in Green Bay and Madison. Promotes exploration and study. Includes membership information, events, trip schedules and contacts. |
| Woodville Karst Plain Project: Devoted to exploration of underwater caves in Big Bend area of northern Florida. Includes articles on history, equipment, procedures, decompression, diving updates, image gallery and contacts. |
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