The state park was named, somewhat obviously, for its mushroom rocks. These formations occur when hard rock sits atop softer rock; the soft rock underneath erodes away over time, leaving the harder rock perched precariously on a soft rock “stem.”

via Mushroom Rock State Park | Marquette , Kansas | Atlas Obscura.

At first I thought they were real mushrooms, which would have been awesome.  Can you imagine having a salad with a mushroom that size?

“Waiter?  Yes, I’ll need a to go cart for my meal, thanks!”