These crazy magnetic anomalies always seem to pop up around paranormal-type areas. I've always assumed that this happens because the earth is a very misshapen sphere, with bulges and divets accross it's face. Not a perfectly symmetrical globe with predictable gravitational forces distributed accross the earth's crust.
CEMETERY GRAVITY ANOMALY
[It’s an old cemetery with a strange anomaly] http://www.topbuzz.com/article/i6552177632971063818?user_id=6489212005084300298&language=en®ion=us&app_id=1106&impr_id=6552843799977003273&gid=6552177637463163146&c=sys