Koshoi-Korgon is an ancient settlement, which is 12 km away from At-Bashi village. This unique historical monument is related to the period between VII and X centuries and used to be a Turkic fortress.

From Kyrgyz Koshoi-Korgon is translated as 'Koshoi's fortress' — according to the legend, Koshoi, one of the closest associates of the main Kyrgyz epic hero Manas, built the fortress. Now there's a museum with archaeological findings of the ancient settlement and elements of the Kyrgyz national culture.