re: #323 wheatdogg
I’ve been to a couple of caves, but not Mammoth or Carlsbad Caverns.
Jewel and Wind Cave National Parks in SD and Howe Caverns in NY. Howe was interesting because I’d done it both as a kid and then as an adult - and when I went as an adult, we took the lantern tour - everyone walked along with a lantern - none of the usual lights were on. Very different experience.