Originally Posted by gasman
That last photo looks like bone............
Yep. That's the "boneyard" section of the cave.
I consider Caverns of Sonora to be one of the top five commercial (oh, heck, even non-commercial) caves in the country. I love the place. It's a "don't miss" roadside attraction.
Louise Hose, Editor of The Homebuilder's Portal by KITPLANES
RV3B, NX13PL "Tsamsiyu" co-builder, TMXIO-320, test platform Legacy G3X/TruTrak avionics suite
RV-6 “Mikey” (purchased flying) – Garmin test platform (G3X Touch, GS28 autopilot servos, GTN650 GPS/Nav/Comm,
GNC255 Nav/Com, GA240 audio panel)
RV8, N188PD "Valkyrie" (by marriage)