Beyond the dragon, you can see an open archway in the southwest corner of the room. Though the dragon appears to slumber, engaging with it is the last thing you want, as it could easily bring the ceiling down on you both. In fact, it's some small wonder how the dragon came to be in this room, given how small all the passageways have been and how large it is. Even its back, which swells as the dragon draws breath, falls short of brushing the ceiling by mere feet.
Sneak around the dragon - OR -Approach the dragon - OR - Try to find the door you came from