Aktash sinkhole
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The sinkhole is located on the edge of the village of Kaleikino. The diameter of the hole is about 50 meters. Depth 25 meters. On the north side of the sinkhole, there is a silted entrance to the cavern.
Juveniles of freshwater fish species are periodically launched into the sinkhole. However, due to insufficient illumination and food supply, there is no stable reproducing population.