The Mausoleum of Shah Fazil is a part of the Shah Fazil Historical and Architectural Complex. The complex is located in the Gulistan village of Ala Buka district. The mausoleum is the burial place of Mahmud ibn Nasir (nicknamed Shah Fazil, fair shah), who came from the Kara-Khanid dynasty that ruled in the 10th-12th centuries. The height of this pyramidal structure is 15.5 meters. The structure consists of a step drum and tall dome resting on it. The interior of the building is decorated with ganch-stucco carvings of bright colors.