The Golden Door is the entrance to the City of Gold, and can only be opened with a combination of the Scepter and the Hedjet.

It appears in the second level of the fourth Area. Explore carefully, as it can be anywhere - in a walled-off area of the map, concealed behind ladders or spider webs, or even at the bottom of a lava pit.

If you have the Scepter but not the Hedjet, a message appears: The Scepter fits, but nothing happens...