Natural Bridge Cave #1
 (Phelps County - US) 
37.846359,-91.919732
37.846359,-91.919732
Profondeur 0m 
 Cavités proche
| Distance (km) | Nom | Longueur (m) | Profondeur (m) | 
|---|---|---|---|
| 84.5 | Fisher Cave | ||
| 85.2 | Meramec Caverns | 7400 | |
| 474.1 | Nic's cave [Tucker Lake] | 205 | 0 | 
| 487.9 | Stoney Springs Cave | 0 | |
| 491.7 | Marengo Cave Main Entrance | 8948 | 23 | 
| 492.0 | Bi County cave | 5 | 1 | 
| 492.9 | Matlock Cave (correct location) | 0 | 0 | 
| 494.4 | Wyandotte Cave Main Entrance | 14806 | 78 | 
| 496.0 | Matlock's Cave [wrong location, doublon mal localisé de #119250 à supprimer] | 0 | |
| 601.9 | Mounds (Cave of the) |