Onyx Cave
# Onyx Cave

Onyx Cave may refer to several things in the United States:

* Onyx Cave (Arizona), a National Natural Landmark
* Onyx Cave (Arkansas), a small show cave
* Onyx Cave (Kentucky), a show cave
* Great Onyx Cave, Kentucky
   * Great Onyx Cave Entrance, Mammoth Cave, Kentucky, listed on the NRHP in Kentucky
* Crystal Onyx Cave, Kentucky
* Onyx Cave (Newburg, Missouri), listed on the NRHP in Missouri
* Onyx Mountain Caverns, Missouri
