Caving
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- Virginia Region of the NSS
- Division of the National Speleological Society (NSS), USA. Includes information on grants, meeting schedule, minutes, and local events.
- 162
- The Official D/FW Grotto Website
- Chapter of the NSS. Dedicated to cave conservation, restoration, surveying and research. Includes newsletter, officer list, meeting schedule, membership policy and contact information.
- 163
- University of Texas Grotto
- Chapter of the NSS. Includes its history, a calendar of events, training sessions and articles about safety and conservation. Located in Austin.
- 165
- East Tennessee Grotto
- Established in 1956 and affiliated with the National Speleological Society. Includes information about cave rescue and conservation, meetings, photo gallery and contacts.
- 166
- The Spencer Mountain Grotto
- A group of cavers caving in the Tennessee, Alabama, Georgia areas. Galleries, news, guestbook and information on cave conservation, safety and lingo.
- 167
- Upper Cumberland Grotto
- Cookeville club affiliated with the National Speleological Society. Includes articles about safety and conservation, photos, membership and contact information.
- 168
- Jeita Grotto
- Features an underground boat trip. Includes profile of two galleries, photos of formations, hours of operation, facilities and contact information. Located 18 km north of Beirut.
- 169
- Bald Eagle Grotto
- Located in Central Pennsylvania. Founded in 1986 for exploration and conservation. Conducts cave rescue training sessions. Includes contact information.
- 170
- Franklin County Grotto
- Chapter of the NSS since 1981 and based in New Franklin. Dedicated to exploration and conservation. Includes meeting and membership information, trip reports and contacts.
- 171
- Greater Allentown Grotto
- A chapter of the National Speleological Society dedicated to the study and conservation of caves and their natural contents.
- 172
- Loyalhanna Grotto
- Chapter of NSS since 1987. Located in Indiana, Pennsylvania and meets monthly in Apollo. Includes safety tips, equipment checklist, membership application and contacts.
- 173
- Pennsylvania Cave Conservancy
- Affiliate of the National Speleological Society. Mission is to protect cave resources within the Mid-Appalachian Region (Pennsylvania, Maryland, New Jersey and Delaware). Open to member grottos in the MAR. Includes contacts and calendar.
- 174
- York Grotto
- Chapter of the National Speleological Society. Advocates scientific study of caves, surveying, conservation and historical studies. Includes meeting and membership information, upcoming events and contacts.
- 175
- Central Ohio Grotto
- Founded in 1952 for exploration and mapping trips. Includes calendar of events, newsletter, photos, meeting and contact information.
- 176
- Cleveland Grotto
- Features a calendar of events, a newsletter, a photo gallery, links and contact information.
- 177
- Greater Cincinnati Grotto
- Member of the NSS. Dedicated to conservation, exploration and research. Includes contact information, newsletter, calendar of events, library holdings and photo galleries.
- 178
- WUSS
- Located in Springfield, Ohio and a chapter of the NSS since 1980. Promotes exploration, scientific study, safety and conservation. Includes calendar of events, equipment tips, photos and contacts.