The North Palace is just past the North Temple.  It is the largest temple at Sayil and is the one that everyone comes to the site to see.  Like all of the temples here, it has a quiet low-key energy to it.  The North Palace has 3 levels just like the Palace at Labna.  The Mexican Government no longer allows anyone to walk up or in the palace, so I did not get much of a feeling for it.

Crop of the map of the North Palace at Sayil from THE MAYA: Palaces And Pyramids Of The Rainforest (2004), by Henri Stierlin, Taschen Publishing, ISBN 3-8228-1241-2, page 163.