It seems that at the Kotel, the general practice is to daven directly facing the wall. (Speaking from experience.)
However, i thought we were supposed to face the kodesh hakodashim, which has a "handy" dome as a landmark. From the Kotel plaza, that's actually to the left of the Wall.
Should one follow the general custom and face the Wall, or face the site of the kodesh hakodashim?
(Side note: Could people be facing the Wall because of a misconception that it's the top holy site?)