We stopped by the side of the road to check out a mushroom farm. Who knew? (Well, I suppose we might have figured it out if we had put some thought into it, but really, who thinks about mushrooms?) So mushrooms are grown in these low, dark cavernous sheds, and you can just go and pick them. According to Vivian, it's important to find ones with thick heads. I'll remember that the next time I go to a pick-your-own-mushroom farm.