Starting at the Bottom

You awaken from your fall in a dark, smokey room. As one of you goes to strike a torch, the fire sputters and barely comes to life, lighting only half of what the torch should show you. You find yourself in a long, narrow chamber, running east-west. In the center of this apartment is a domed shape on the floor. In the east wall is a blank-faced stone door. The west end of the room is blocked by fallen stone and rubble, apparently the result of a collapse. The two side walls appear to have several niches cut into them.
The shape in the center of the chamber appears to be a small alcove, protected by a half-dome with the open end facing towards the door in the east wall. This alcove is set in a recessed, shallow, tiled well, one foot deep and teen feet wide. The alcove itself is four feet high. The recess contains some sort of display.
The display appears to be a diorama depicting a hunting party of oddly dressed warriors, in feathers and deer-hide garments, in a mountain side scene. Some have pulled down a stag with the aid of a dog, another group is cleaning a small mule deer, and other's have cornered a panther with their spears. A scout watches the panther from an outcropping above. He holds a metal staff witha  loop in its end. It looks like a shepherd's crook.
The three niches on both the northern and southern walls are five feet wide and about three feet off the floor. Each niche contains a diorama depicting some aspect of tribal life. The six-inch-tall figures in all of the displays appear to be made of stucco, realistically and brightly painted. The scenes portrayed represent fishing, farming, religion, warfare, the creation story, and crafting.
A cave-in completely blocks the west end of the chamber. At short intervals, small amounts of rubble and dirt come spilling into the room. Several large stones appear to have wedged themselves tightly, closing the collapse. The hole you came from above offers no source of light, obscured by an odd amber gas which lightly obscures the room around you. It irritates your nose and throat as you breath it in.
Only one thought crosses your mind as you look at one another: Where are we, and where do we go now?