Kyrk-kyzbulaq is a holy site, object of worship of local population. It is located to the southeast from the village Kyr-Kiz.
The name, according to legends occurred after the incident when the village girls were bathing the village was attacked by an enemy. To avoid ignominy girls addressed to the Deity that turned them into fish. Since then the lake became known as Kirk-Kiz.
Since then, the lake became known as Kirk-Kiz. Today the lake with springs is a favourite place of pastime of locals with a family. Rest is covert pilgrimage to the holy site representing rather well-planned place in eastern part of the small lake with pavilions with separate terracce, trestle beds and hearths for cooking.
Kyrkkyzbulak is the recent name, earlier it was called Kulyata. To the West, directly on the bank of the lake the archaeological monument – Kulyat’s ancient settlement is located. It represents ruins of one of the largest craft centers of a valley of Akhangaran once focused on processing of mining production. The ancient settlement is of a three-part. The core of the city is citadel laid out in subrectangular form with a height of 10 m on the area of 0.5 hectares. In the northern part of the citadel there was a fortified castle – donjon which had a subtriangular form in layout. Shakhristan and Rabat are slightly expressed though allocated with researchers. Up to 1920 Northern and Western parts of the Shakhristan and Rabat were occupied by arable lands and houses of locals. The total area of the ancient settlement was determined in 30 hectares. In 70`s of the XX century the academician Y.F. Buryakov revealed the site of an urban area enclosed with an additional wall, stretched along the suburb in the western direction almost to 600 m. and merging with a natural ridge of basis of the citadel in the east. Thus the total area of the city was defined as 50 hectares. Researchers identify it with the city of Tukket, medieval Ilhak’s second metallurgical center.
In the historical and geographical literature of Arab and Persian authors of X century the city is mentioned as a modern city with great dignity.
Archaeological studies of the ancient settlement showed that the early settlement here arose during the period of “Kaunchi I” i.e. in the III- IV centuries AD and was settled down along the channel fed by the spring waters.
Later in the second half of I millennium there began a significant expansion of its territory to the south-west. So that to provide the town with water the artificial lake was created on the basis of spring waters.
The real beginning of functioning of metallurgical shops adjoining the citadel from the northeast refers to this time. Numerous traces of metallurgical production indicate its increasing craft orientation later. Transformation of the settlement into a town was contributed by a number of factors. Among them its proximity to the region of mining and probably, existence of the woods, and thus development, on their base and on the raw materials, of the metallurgical production, a convenient location (with a good water source) on a way deep into ore areas.
In the early Middle Ages Shahristan and the Citadel allocate. And the citadel was surrounded by a fortified wall of 6 m thick. IX-XI centuries the city reaches its maximum size. However density of the building in urban area varies. Archaeologists noted also moving craft and metallurgical workshops to new sites. Archaeological materials unambiguously indicate that Tukket was one of Ilak’s most significant points on processing of polymetallic ores and partially iron. Analysis of slag shows that raw materials do not come from one particular field but from different areas. It is assumed that the raw material could come from Altyntopkan, Kanjilo-Taboshar mines and workings of the closest Kurgashinkan. Most likely, that was not a consequence of managing but one of the characteristic phenomena taking place in the economy of the region in X-XI centuries when due to reduction of the area of the woods there came to reduction small workshops of melting thus concentrating metallurgical production in the cities or large settlements.
In the territory of the ancient settlement some treasures of coins, including well-known “The first Kulyatinsky treasure” and “The second Kulyatinsky treasure” of the XII century were found, that gave a valuable historical material on Ilak’s karakhanid rulers.
After the political upheavals beginning of the XIII century the city fell into decay. Most of the identified urban area bears traces of desolation. Only the central part continues to grow roots up to XV-XVI centuries.
For the first time ancient settlement Kulyata was mentioned in 1928 when participants of geological congress examined its slag fields, then in 1934 it was surveyed by academician M. E. Masson who made a plan of the ancient settlements and its district and multiple traces of metallurgical production were revealed. However, the first archaeological excavations were conducted by Y. F. Buryakov only 60-70s of the last century. Currently Kulata settlement is in disrepair.