A formation known as "Mushroom Rock" at Horse Pens 40 nature park in Steele, St. Clair County.
Mushroom Rock at Horse Pens 40
![](https://bunny-wp-pullzone-5vqgtgkbhi.b-cdn.net/wp-content/uploads/2023/04/Mushroom-Rock-1-920x1300.jpg)
Photograph courtesy of St. Clair County
![](https://bunny-wp-pullzone-5vqgtgkbhi.b-cdn.net/wp-content/uploads/2023/04/Mushroom-Rock-1-920x1300.jpg)
A formation known as "Mushroom Rock" at Horse Pens 40 nature park in Steele, St. Clair County.