Caving
- 221
- Wonder World
- Includes geology, history, description of rooms, hours, rates, discount coupons, group tour reservations, gift shop, nearby attractions and contact information. Located in San Marcos.
- 224
- The Lost Sea
- America's largest underground lake, near Sweetwater. History, tour information, location details and group advice.
- 225
- Tuckaleechee Caverns
- Includes history, description of formations, photos, hours of operation, ticket prices and map. Gift shop on premises. Located in Townsend.
- 228
- Laurel Caverns
- Guided tour lasts 55 minutes. Includes information about separate wild tour, hours, admission fees and contacts. Located east of Uniontown.
- 229
- Lost River Caverns
- Offers guided tours. Includes history and geology of the cave, hours, directions and contact information. Gift shop, museum and picnic area on premises. Located in Hellertown.
- 230
- Penn's Cave
- Offers one-hour tour by motorboat on an underground stream. Includes schedule and rates, special events, wildlife tours and contacts. Gift shop on premises. Located in Centre Hall.
- 231
- Woodward Cave
- Includes description of guided tour, rates, hours, map and directions, souvenir store and campground. Located east of State College.
- 233
- Olentangy Indian Caverns
- Thirty minute tours re-create the days of lost Indian tribes and pioneer explorers. Delaware.
- 234
- Perry's Cave
- Guided tours through a natural limestone cave, offering gemstone mining outside and a unique gift shop inside. Put-in-Bay, South Bass Island, Lake Erie.
- 235
- Linville Caverns
- Offers 30-minute tours. Includes admission fees, hours, history, photo gallery, area attractions, directions and contact information. Located in Marion.
- 236
- Howe Caverns
- 45 metre entrance elevator leads to a walking tour culminating in a boat ride. Located nearAlbany.
- 237
- Natural Stone Bridge and Caves
- Includes history, photos, descriptions of formations, rates and group information, discount coupon and directions. Located in Pottersville.