The relatively massive foundations of a large barn. According to aerial photos (one included), this was standing in 2002. By 2005, the roof had collapsed. There were some large burnt timbers in the area, so it may have succumbed to a fire, but I don't think so. What I assume was some kind of feeding structure (Beatty is the manufacturer) remains. This place looks more like the remains of a fort with some kind of keep, rather than a barn.