This area of Under-Tyr is a natural subterranean cavern and associated cave complex. The many stalagmites and stalactites decorating the caves give the area its name. A century ago, Kalak sent a group of dwarves and half-giants to seal off the Teeth after yuan-ti were sighted in the deeper tunnels. When Kalak was overthrown, some of the works of his defiling magic failed. Those who have the gift of psionic foresight believe that passageways to an ancient yuan-ti temple might soon gape wide beneath the streets of Tyr.