On top of the pyramid on the north east side are some stones with unusual magnetic properties.  Specifically, a compass will not point to true north when placed on these stones.  If I recall correctly, the stones are made of Andesite.  As you can see many of these stones have a “T” shape cut into them.  The “T” shape is found throughout the stones and gates of this site; a motif.  Between these magnetic stones is a sunken courtyard.  I felt that these stones were cool and enjoyed touching them.