Taking the concept of a farmhouse brewery quite literally, Scratch Brewing Co. in Carbondale, IL forages non-traditional ingredients directly from their surrounding land to create truly unique beers. (They even wrote a book about it).
They feature a wide range of styles (from a Tart Wheat to a Barrel-Aged Strong Ale), but with ingredients like arugula, chanterelle mushrooms, ground ivy, gooseberries, hickory bark, basil, carrots, and birch sap. Rather than bombarding the taste buds with weird flavors, each beer is carefully designed to pair these unusual ingredients with traditional ones—the Scratch folks also grow their own hops and have started growing test crops of barley, wheat, and rye.