I've been in quite a few of those. Spent the night in one of them. The lost sea is a tourist attraction but still worth going to see. Ruby Falls is a tourist attraction also but, again, very well worth taking the tour. I managed to get to one of the lesser known caves one time. After getting back into the cave there was a sandy place. Right in the middle of the sandy spot was a huge cat track! That was as far as that caving experience was going to go! We "lit a shuck" out of there before quick!