Jambas- Kala- fortress, 4th century B.C-1st  century A.D.

Located on the northwestern slope of a flat rocky hill. Stretching to the south- east from Sultanuizdag.                In 1946-1948 the fortress was first photographed from the air. It is rectangular in form with a range of 200x170 meters.

The collected items, mostly ceramics, belong to the early antic ("Kaygun") culture of Khorezm.