MAIN CAVE ENTRANCE
CRYSTAL ONYX Cave was discovered in 1960 by Cleon Turner. He found the entrance at the bottom of a sink hole and it was blocked with a large rock.
Before the cave was open for tours in 1965 the sink hole was cleared out and space for a stairway was blasted into the limestone.
An entry building with restaurant was built over the cave. That building was torn down and the current entry building was made.
Scott Sendtko widened the concrete stairs, rebuilt the metal ones over the shaft and redid the entry building. You can still see some tree stumps along the sinkhole edge.