Caverns visited in the U.S. and Canada
| Carlsbad Caverns National Park, NM |
| Caves at St Martins, New Brunswick |
| Jewel Cave National Monument, SD |
| Lake Lenore Caves, Dry Falls, Washington |
| Lehman Caves, Great Basin National Park, NV |
| Mammoth Cave National Park, KY |
| Old Man’s Cave, Hocking Hills State Park, OH |
| Rock House, Hocking Hills State Park, OH |
| Wind Cave National Park, SD |
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