Oh I love those fairy rocks, Sissy. I've never seen any like that before. I'll have to watch for them, maybe look closer when I go rock hunting again in the creek under the bridge!
The best way to get rid of moles and voles (BTW, voles are a cross between a mole and a mouse, I think) is to get rid of their food source. However, they will leave your yard just long enough for the food to return (grubs and worms) and then they will be back. I'm so very lucky, not a one mole or vole in my yard ... yet anyhow! If anyone played a dirty joke on me and dropped just one female off that was pregnant, I would be up a creek! I have farm fields all around me for a mile in each direction, so all bugs are killed out in the fields. It would be a very long walk for a mole or vole to get to my worm/grub enriched yard. I just hope no one ever figures it out! I have had my share of moles in the past, and the only way I found to really get rid of them was to kill the grubs. The bad thing is that the stuff probably killed the worms, too, which was NOT a good thing!
Colleen, I used to have Rat Terriers, and there were no moles in our yard, just lots of craters! LOL I believe you're absolutely correct, your "terminators" would have made far larger mess. But, how frustrating it would be to have your concrete treasurers toppled by a mole or vole. My friend that lives in the woods has not only deer eating her spring flowers, but moles and voles feasting on her hostas until there is nothing left. I've never seen such destruction. And, she's a Master Gardener, and is still having a hard time getting things to grow.