Ygdykala shows the remains of a Parthian frontier fortress (I c. BC - IV c. AD), located on the high rocky bank of the Uzboy River. It is situated deep in the desert, at 150 km north of Serdar town.

The fort functioned for the control of water trade way along Uzboy (from India to the Black Sea area).

Despite the uncharacteristic building material (stone), Ygdykala repeat in all details the principles of Khorezmian construction style, and corresponds fully to the standard of Parthian forts in its layout.