Caravansary of the Flind's Cistern

From the introduction:

In a desert of saliferous dunes, a customs post once choked with traders from a past age shields the only cache of water. A long war, coupled with pestilence, diminished the safety of its handy route. The vacated caravansary is now part of the wild domain held by bestial Flind, a crumbling haven that can ease thirst but attract woe.