After visiting the Coatepantli, we walked around Pyramid B and over to the Palace of Quetzalcoatl.  The Palace of Quetzalcoatl extends out from the side of Pyramid B.  This Palace is currently being restored, so we only saw part of it.  I did not feel anything from this structure.  Hopefully INAH has finished restoring this Palace by now.

The Palace of Quetzalcoatl, seen from Pyramid B, at Tula

The Palace of Quetzalcoatl, with Pyramid B in the background, at Tula