Dayahatyn

thumb|300px|View from the courtyard of the main entrance of the Dayahatyn caravanserai, March 2018

Daýahatyn (), also spelled Dayakhatun (), is a medieval caravanserai, sitting on the left bank of the Amu Darya. It is around to the northwest of Turkmenabat, near the Turkmenistan–Uzbekistan border. Daýahatyn is a fortified square enclosure with sides long. It is believed to have been originally a fortress built by Tahir ibn Husayn in the 9th century. In the 11th century, it was transformed into a caravanserai with fascinating brick-structures, providing shelter for not only caravans but also elites during their long journeys. The integrity of Daýahatyn is a typical example of the mastery of Seljuk architects in brickwork during the 11th and 12th centuries. Because of its artistic excellence, Daýahatyn is regarded as one of the most valuable examples, and perhaps the finest example, of a caravanserai extant in Central Asia, aside from that of Ribat of Sharaf.