- Dallas/Fort Worth Grotto
 - Dedicated to the responsible exploration, conservation, restoration, and surveying of caves. - Dogwood City Grotto
- Active caving club located in Atlanta, Georgia. Site offers club details, photo gallery, members page, and links.
- Met Grotto
- New York City's caving club and chapter of the National Speleological Society.
- Monongahela Grotto
- North-central West Virginia chapter of the National Speological Society. Includes trip reports, calendar, and photo album.
- National Speleological Society
- Dedicated to the exploration and preservation of cave resources. Site includes membership information, event listings, and discussion board.
- Ozark Highlands Grotto
- Caving club in southwest MO. Site contains newsletter, member's manual, links, photos, and more.
- Philly Grotto
- Devoted to cave conservation and exploration. Site includes calendar and membership information.
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