Nice. My son would love to run through that circle causing havoc; of that I have no doubt.
Reminds me of a cool game I play with one of my brothers every now and then when I visit - Morels. Seriously entertaining card game that would be very well suited to the current state of the world. But anyway, one of the valuable cards is a ring of 'shrooms.
I've never seem this before.
And I won't be wandering down any country roads look for these rings.
Morels is seriously enjoyable, and especially great as it's only for 2 players which happens to be a bit rare to find. Very good; recommended.
I posted this on Social Media as it is a fine example of a ring, and so far it has had over 400 hits! So many people have remarked that they have never seen one, I am amazed. We grew up in the country as kids finding them every autumn.
There are many theories as to why they grow in a circle.