You leave the big darkened chamber and circle the area in intention of getting back to the chamber from the other side. You reach to another opening.
The most notable feature of this place, other than the smooth walls and ceiling, are the large, round boulders scattered around. As you look the floor over, a drain-like slope to a great sinkhole in the center catches your attention. It might be that at one time a flow of water filled this place but later drained away with the opening of the sinkhole. The latter is a shaft funneling down to a pipe of about 8' diameter. Light reveals that it goes down over 50'.
From the other side of the shadowy cavern (~30') rise a bulbs thing in the air, like a balloon. Mother of Horrors - It is a beholder! and he is floating your way.
[sblock=Toman]
Hmm. something strange about this beholder ... it doesn't look like one. No open mouth. It is a gas spore.
[/sblock]
