I was just over here about 30 minutes ago, read your whole article and apparently left without saying anything or voting or anything 'engagey' and now I feel about this big.
I've been in a few Travertine caverns and caves, one I remember well was in Utah USA, I was a young kid. It was the same day I learned what stalagmites are.
Your husband's a lucky dude.
I've seen another stalagtite and stalagmite.. but I never seen this one. After seeing this bocca I finally read more about what travertine is and I found that you have huge bocca there in Utah and I wonder why can't i find something like huge hot water fountain like in your park there in this place.
Thank you @dandays... you must be thinking that I just do cross posting, LOL.