Hana Lava Tubes (United States) Hana Highway, Haiku, Maui, HI 96708
Kula Kai Caverns (United States) 92-8864 Lauhala Drive, Ocean View, Hawaii, HI 96737
Mark Twain Cave and Cameron Cave (United States) 300 Cave Hollow Rd, Hannibal, MO 63401-5386
Lincoln Caverns and Whisper Rocks (United States) 7703 William Penn Hwy U.S. Route 22, Huntingdon, PA 16652-4843
Mermaid Caves (United States) 89-410 Keaulana Ave, Waianae, Oahu, HI 96792-4109
Spider Cave (United States) 727 Carlsbad Cavern Hwy, Carlsbad, NM 88220-9463
Makauwahi Cave Reserve (United States) Kalaheo, Kauai, HI 96471
Oregon Caves National Monument (United States) 19000 Caves Hwy, Cave Junction, OR 97523-9746
Jewel Cave National Monument (United States) 11149 US Highway 16 Building B12, Custer, SD 57730-8167
Lava Tube Cave (United States) Queen Ka'ahumanu Hwy, Kailua-Kona, Hawaii, HI 96740
Na Pali Makai (United States) Kikiaola Harbor, Kekaha, Kauai, HI 96752
Kilauea Caverns of Fire (United States) Between Hilo and Volcano off HWY 11, Kurtistown, Hawaii, HI
Dunbar Cave (United States) 401 Dunbar Cave Rd, Clarksville, TN 37043-5725
La Jolla Caves (United States) La Jolla, San Diego, CA
Sunny Jim Cave (United States) 1325 Cave St, La Jolla, San Diego, CA 92037-3684
Redmond Caves Recreation Area (United States) SE Airport Way, Redmond, OR 97756
Louisville Mega Cavern (United States) 1841 Taylor Avenue, Louisville, KY 40213-1565
Luray Caverns (United States) 970 US Highway 211 W, Luray, VA 22835-5260
Old Man's Cave (United States) State Route 664, Logan, OH 43138
Ash Cave (United States) Hocking Hills State Park, Logan, OH