>Make a left at that mighty pillar.
>You take a left at the pillar, and work your way through another, somewhat narrower tunnel that descends in a very loose spiral. After traversing a few more nondescript passages you emerge in a large, low-roofed chamber. A moderately sized body of water occupies much of the chamber, with a river continuing off into the gloom. You can hear the sound of rushing water in the distance. The whole place feels rather damp.
>There are several passages leading out of this chamber: one in the wall ahead of you, where the river runs, two to your left, one narrow and craggy, another somewhat larger, and one to your right, rounded and smooth.