Decomp
Once upon a time, there was a barn built upon a stone foundation. When the barn came down, they just covered over the foundation with dirt. A lot of that has collapsed, so the area is unpredictable.
...use caution there sportfan. Where there is an old barn there might be an old house. Where there is an old barn and an old house there could be an old outhouse. Ya don't want to find that. First of all it's an unpleasant place to be and second, ya probably couldn't get out of it.