On the door to the south, you find a very familiar looking door. It looks just like the one that led to the last room, with the winding dragon and the orb.
Like the other one, the door itself is an ancient stone door that is long and tall, a full 15 feet tall at its top. You brush off some of the old dust and look closer at the door. The ancient stone has a bas relief carving of a winding dragon moving toward a glowing orb of some sort.
The door does not have any door handles or apparent hinges. An inspection does not reveal any traps on the door. However, the orb in the center of the door (about 6 feet off the ground) appears to not be carved out of solid stone and perhaps could be pushed in.